What do AM and PM mean when indicating time, how to decipher it? Is it possible to change the time format to normal without reinstalling Windows?

Telephone numbers of exact time services - a complete directory for all cities

Precise time service is an organization where information about the measured current time is stored and provided with high accuracy. Absolutely every subscriber who wants to set the clock and make sure that his smartphone shows 100% correct time can call here. Of course, in the Internet era, you can find out the exact time online, but if you don’t have access to the network or don’t want to waste traffic, it’s most convenient to call a special number - different cities have their own exact time service numbers, which is why we have prepared a complete directory of regions where you can find current contacts.

Why you need to know where Screen Time is on Android

Screen Time is a fairly new, useful and important feature in Android that many are unfamiliar with. With its help, you can find out how much time a day you use your smartphone in general, which applications you launch most often, and how many minutes (or even hours) you spend in them. Using this data, you will determine whether you are overusing the gadget and, if necessary, you can limit the time you use it if you notice a problem.

Depending on the Android , you can view screen time in different ways. Android 9 and newer introduces the Digital Wellbeing , where you can not only check how many hours and minutes you spend on your smartphone or in certain applications, but also set limits on the duration of their use.

In lower versions of Android, as well as on smartphones with proprietary shells from manufacturers, there “Digital Well-Being” . In this case, you need to look for the necessary information in the “Applications and notifications” or “Battery” .

If the built-in capabilities do not allow you to view screen time on Android , software from third-party developers comes to the rescue. You can find it in Play Market , we will talk about the best utilities below.

Telephone service of exact time in the CIS countries

Not only residents of Russia can find out the exact time - the service is also available in the nearest CIS countries. Thus, the exact time service operates in Ukraine, Belarus, and Armenia. What’s convenient is that the call numbers are identical throughout the country, so when you go on a trip you only need to write down one phone number and call it.

Telephone service in the CIS works the same way as in Russia - the subscriber calls a special number, where the answering machine reports the current time accurate to the hour, minute, second. In addition, you can determine the time on our website - online, taking into account your location.

What do AM and PM mean?

The definition of time in English is closely related to am and pm. These abbreviations came into English from Latin and simply indicate the two halves of the day: from midnight to noon and from noon to midnight. The meaning of am and pm is as follows:

• AM – ante meridiem , “before noon”, interval from 00:00 to 12:00
• PM – post meridiem , which is Latin for “after noon”, the interval from 12:00 to 00:00

The United States of America, Great Britain and English-speaking Canada use the 12-hour time system in English.

How to find out the exact time from your home and mobile phone?

To find out the current time, you need to call the exact time service number from your home phone and wait for a connection to the answering machine - the service is completely free. If you don’t have a landline phone nearby, you can use a mobile device:

1. Open the phone dialing menu.
2. Enter the number of the time service in your region.
3. Press the call button - the call is paid.
4. You can specify +7 and the city code before the exact time service number, then the connection will be charged as a call to a landline phone.

By the way, the service of informing about the exact time is also provided by mobile operators themselves, offering to call a short number or send a USSD request - however, such a call or command is always paid, which is completely unprofitable for the subscriber. Another disadvantage of the service from the operator is that the answering machine reports the exact time of the region where the service contract was concluded; if the subscriber is now in another city, it will not be possible to find out the local time in this way. We recommend setting up your smartphone by synchronizing time with network data, and also using our website - it is guaranteed free and absolutely accurate.

Time in phones: what and how it works

Surely many have noticed problems with the readings of the built-in clock. Someone may have noticed some oddities with the time display related to SMS. This is especially noticeable immediately after the days when many countries switch to winter or summer time.

To understand how it all works, you will need to dig a little into the architecture.

Let's try to figure out why such problems can occur, what affects the time readings, and what can be done if the phone suddenly starts showing the wrong time.

Standard time

I won’t talk about what geographical and administrative “time zones” or “time zones” are, as they are now called in Federal Law No. 107-FZ of 2011 “On the Calculation of Time,” because it’s on the Wiki.
From this basic information, it is important to remember that the difference between the meaning of standard time and “universal time” (UTC) (in everyday life the equivalent of “Greenwich Mean Time” - GMT) is the result of purely administrative actions of the authorities. Whatever difference the authorities assign for a specific area, that’s what it will be. Let's first try to understand the time processing functions in network equipment.

Time and SMS

In a text message sent from a phone (SMS-SUBMIT), there is no space at all for time information.
Only at the moment a message arrives at the SMS center does it acquire a time stamp field - TP-Service-Centre-Time-Stamp (TP-SCTS), consisting of 7 octets with semi-octets rearranged (GSM 03.40, TS 23.040) and represents the information in binary -decimal code (BCD), that is, each semi-octet encodes one digit.

The first 6 octets represent the year, month, day, hour, minutes and seconds of the sender's local time. The seventh octet contains information about the time zone, and indicates the difference between local time and UTC (GMT). The unit of measurement for time difference is a 15-minute interval, and the third bit (most significant in the right semi-octet) indicates the algebraic sign of the difference (“0” is positive, “1” is negative). "Daylight Saving Time" must be taken into account in the meaning of time zone information. For example, in the UK the value of the time zone octet is 00000000b (UTC+00:00) during winter time, and 01000000b (4 x 15 minutes, i.e. UTC+01:00) during summer time.

In the structure of a short message delivered to the recipient's phone (SMS-DELIVER), information about the time of arrival of the message to the SMS center is already present, and can be used by the phone when displaying information about the message to the user.

What information about the current time can the mobile network provide to the phone?

In 1996, in the GSM specifications (GSM 02.42, 04.08, etc.), tools appeared that allowed cellular operators to deliver information about the date, time and time zone to phones.
For this purpose, signaling messages intended for Mobility Management provide several information elements that can be used by the operator at his discretion, since they are optional. the IE "Time Zone and Time" information element

. It contains all the data (year, month, day, hour, minutes and seconds) indicating the moment when the network transmits the signaling message, as well as a value indicating the time zone in which the base station is located. The values ​​of year, month, day, hour, minutes and seconds, as in the case of SMS, are transmitted in BCD encoding with semi-octet rearrangement, but unlike the SMS center timestamp, they indicate universal time (UTC), not local!

The time zone part of the information element is transmitted in the same encoding as in the case of the SMS center timestamp.

This is what a block of information sent to the phone at a specific point in time looks like:

Octet meaning/interpretation

47 Code indicating that 7 octets follow IE “Time Zone and Time” 11 YEAR: 11 20 MONTH: 02 71 DAY: 17 70 HOUR: 07 71 MINUTE: 17 30 SECOND: 03 21 TIME ZONE: 12 = GMT+03 :00 49 Code indicating that IE “Daylight Saving Time” comes next 01 Length of IE “Daylight Saving Time” = 1 octet 00 Value indicating no offset due to “daylight saving time”

Because the network transmits the "Universal Time" (UTC) value in this information element, in order for the phone to display local time, it must adjust UTC to a value that corresponds to the time offset in the time zone in which the phone is located. In this particular case, the case took place in Moscow, even before the adoption of the law “On the Calculation of Time” and the abolition of the transition to winter time.

Thus, the time transmitted by the network corresponded to 10 hours 17 minutes and 3 seconds in the morning of Moscow time on February 17, 2011. For comparison, a block of information transferred to the phone quite recently:

Octet meaning/interpretation

47 Code indicating that 7 octets follow IE “Time Zone and Time” 21 YEAR: 12 40 MONTH: 04 81 DAY: 18 80 HOUR: 08 45 MINUTE: 54 44 SECOND: 44 61 TIME ZONE: 16 = GMT+04 :00 49 Code indicating that IE “Daylight Saving Time” comes next 01 Length of IE “Daylight Saving Time” = 1 octet 00 Value indicating no offset due to “summer time” This information was transmitted in Moscow at 12:54 :44 April 18, 2012.

In addition to the “Time Zone and Time” information element, the specifications also provide a separate 8-bit information element designed to transmit information only about the time zone ( “Time Zone” IE

).

The information in it is encoded in exactly the same way as the time zone value in the SMS center stamp. However, there doesn't seem to be much point in transmitting "Time Zone" along with "Time Zone and Time".

There is also a separate information element ( “Daylight Saving Time” IE

), which, if transmitted, indicates the value of the time offset caused by the use of "daylight saving time" that was taken into account when calculating the value of the time zone field.

A specific value can indicate no shift (“00b”), a shift of +1 hour (“01b”), and even a shift of +2 hours (“10b”).

According to the GSM/3GPP specifications, time information must be delivered to the mobile phone as soon as possible when the phone registers with the network, the time zone changes, or the transition to summer or winter time occurs.

Thus, by means of the means described above, the network can provide telephones with all the information necessary to correctly set and display the current time and the time associated with short messages.

But, according to the provisions of the standards, the use of this information is assumed solely at the discretion of the phone manufacturer

.

However, users may experience some problems for reasons that are completely or partially independent of the phones and their manufacturers.

For example, an SMS center that serves multiple time zones must take into account the time at the location of the sending phone. Otherwise, the time of SMS sending will be recorded with an error equal to the time difference in the time zones where the SMS center and the sending phone are located. In areas located close to time zone boundaries, the operator must ensure that base stations transmit the value of the time zone in which the base stations are located. Of course, operators take these features into account when planning and configuring their network.

However, due to the laws of radio wave propagation, operators cannot fully guarantee the correctness of the time information delivered to the phone. After all, a telephone located near the administrative boundary of time zones can receive signals and use date and time information from base stations located in the adjacent time zone and transmitting the corresponding information.

For the same reason, the SMS center may incorrectly determine the time zone where the phone is actually located if the SMS transmission occurred through a base station located in an adjacent time zone.

In addition, short-term problems are potentially possible due to the fact that the software of network equipment and SMS centers will automatically switch to summer/winter time contrary to the new Russian realities, or was incorrectly configured at the time of commissioning. But such “nuances” are usually quickly corrected by service personnel.

Other sources of information about time and place

There are other channels for delivering information about the date, time and location to mobile phones.
Many phones have navigator functionality and can use time and location information from positioning systems (GPS, GLONASS, etc.).

Phones (tablets) connected to the Internet can use additional time information using NTP or SNTP, as well as information about the location of “binding” public IP addresses. Along with manually setting the time and time zone, such an abundance of initial information in some cases can give rise to problems for the phone in choosing what information about time and location to use.

How phones use time information

Clocks first appeared in phones in a fairly simple configuration - they simply showed the time on the display.
In case of moving or changing time to summer or winter, it was enough to simply change the clocks in accordance with the new realities. Naturally, the ability to manually set date and time parameters in phones remains to this day.

When setting up manually, the user enters the current date, time and location (time zone) and is responsible for the correctness of the entered information.

It would seem that everything is simple and unambiguous? But even in the manual configuration option, problems may arise if the phone software is set to an incorrect correspondence between the time zone and the city that the user specified as his location.

If you use the wrong time zone value, then when you move to another city/country and change the time zone value accordingly, you may find that the time on your phone is different from the actual administrative time in the new location.

As processor performance and memory capacity increased, phones began to incorporate increasingly complex functions related to time, dates, and calendars.

And now the situation with the automatic date and time setting mode looks much more interesting. If the GSM/UMTS mobile network in which the phone is registered does not transmit information about the current date and time, then the phone should seem to display the data that the user entered manually, despite the fact that the automatic mode is set. However, it cannot be completely ruled out that developers of some models can use information from positioning systems or the Internet.

In cases where the operator transmits information about date, time and time zone in signaling traffic, the most logical solution would be to use this information - to display local time calculated based on the UTC values ​​​​and time zone offset received from the operator.

However, in practice, some manufacturers (their software developers) have begun to show not always reasonable initiative in attracting other sources of information. For example, it was noticed that in the automatic time correction mode, some models for some reason, instead of information about the time zone transmitted by the network, use the value set by the user in the manual setting mode!

Due to changes in time zones in the Russian Federation according to Federal Law No. 107-FZ of 2011 “On the Calculation of Time”, in phones whose software was developed earlier, data on time zones in many Russian cities has now become incorrect. As a result, if such a phone uses the value set in manual settings instead of the time zone information received from the network, the time may be displayed incorrectly.

Obviously, the correction of such errors should be carried out by the phone manufacturer, who is responsible for using the information received from the operator by standards. However, in conditions of fierce competition, manufacturers, trying to ensure the release of more and more new models, quickly stop making changes to the software of previously released models.

In such cases, manually setting the time zone value, adjusted in accordance with the above Federal Law, can help.

For example, for Moscow you can set not the old value UTC+03:00, but UTC+04:00, without paying attention to the name of the city (for example, Baku, Yerevan or Tbilisi).

Some older phones may display incorrect time due to the fact that they interpret the time value received from the network as local time rather than universal time. Obviously, in this case, only the manufacturer could fix the problem by developing a new version of the software. It’s true that it’s hard to hope for that.

There are also known problems with some models with the interpretation of the time of sending SMS.

The receiving phone receives in SMS information about the local time and time zone in which the sending phone was located on one side, as well as from the network the UTC values ​​and time zone at the place where the SMS was received.

Then the recipient phone can do with this information whatever the manufacturer intended - how it will process all this information before showing it to the owner, the standards assigned exclusively to the responsibility of the phone manufacturer.

Unfortunately, software developers of some models made mistakes when processing SMS sending time parameters, and mislead the user.

Without pretending to be an exhaustive description of all possible problems with time display, I tried to describe the mechanisms, knowledge of which can help to understand the causes of the problem in a particular case and find an acceptable solution.

Telephone numbers of exact time services in Russia

Comparison table of 24-hour and 12-hour time formats

Despite the difference in writing time, the day is the same for everyone. We have already found out above that in the 12-hour time format 12:00 am equals 00:00. The time from 12:00 am to 12:00 pm is equivalent to the time from 00:00 (midnight) to 12:00 (noon) in 24-hour time format.

To indicate the time in this interval from midnight to noon, an English speaker living on a 12-hour clock would use essentially the same notation as a person living on a 24-hour clock. The only difference is that 00:00 for us is 12 am for them.

Time notation in English

As soon as the clock hand moves from 11:59 to 12:00, morning gives way to afternoon and noon comes.

Now we need to change the time to afternoon or PM. To convert time from 12-hour clock to 24-hour clock, you need to subtract 12 from all hours that go after 12:00. In English-speaking schools, this is the method they teach children when they teach the topic of time. Here's how to do it:

Have you heard that in America and some other countries there is such a thing as “military time ” ? To avoid possible confusion with am and pm, some industries are required to use the familiar 24-hour format.

It is used by police officers, military personnel and doctors. The military time format omits the colon and adds the word "hours": 1300 o'clock , while the 24-hour time format uses a colon and drops the word "hours": 13:00.

How to check the exact time with a tele2 operator

This way to find out your number is probably the most reliable. Immediately after purchasing a new card or phone, you must dial the number indicated on the cover of the starter package into your mobile gadget. Enter it in the “Contacts” section as “My number” or in another way, but so that it is clear that your own phone number is stored here. Messages

How to find out balance on TELE2

Tele2 offers 50 SMS to all numbers in your home region. The remaining messages can be used next month.

There is a fixed subscription fee of 199 rubles per month, which is charged instantly when connecting to a tariff plan or switching to it. Then regularly a month after the last write-off.

In the SIM card menu

If you don’t want to overpay your provider for viewing the time, set up your mobile device settings for free. To do this, follow these steps:

1. Open your cell phone settings.

2. Find the date and time in the list of parameters.
3. Set up time synchronization over the network.
4. And check the box to agree to use the network time zone.

After this, the device display will display relevant information in the current location. If you turn on the GPS module, the data will be automatically adjusted. But constant use will quickly drain the battery.

Attention! The internal interface of different models and manufacturers may differ significantly.

Telling time in English by the clock: example sentences with am and pm with translation

Let's see how these abbreviations are used in real life.

• We should send this parcel by three (3) pm today. – We need to send the parcel by three in the afternoon.
• I finish work at five thirty in the afternoon (5:30 pm). – I finish work at five thirty in the evening.
• My train departs at four thirty five (4:35) am . - My train leaves at four thirty-five.
• She will be here for dinner at seven (7) pm. - She will come for dinner at seven.
• Maria told him to be back home at twelve (12) pm . – Maria told him to be home by 12 (noon).
• Everyone should be back from the party by twelve (12) am. – Everyone must be back from the party by 12 (midnight)
• It is three fifteen in the morning (3:15 am) . - It's three fifteen in the morning.

How to write and use am and pm correctly

There are several uses of am pm in the letter. The time can be specified like this:

• Lowercase letters with dots: am and pm
• Lowercase letters without dots: am and pm
• In capital letters without dots: AM and PM

In business correspondence by email or messenger, as well as in regular correspondence with friends, you can use any spelling of am pm - the translation will be the same. However, most often it is written in small letters without dots: am, pm.

Methods suitable for all operators

SIM card service menu Modern smartphones can set the time and date correctly according to the SIM card settings, for this it is necessary: ​​When we need to see what time it is, we directly turn on our smartphones.

• How to Find Out the Exact Time from a Mobile Phone for Free Tele2 Moscow|how to Find out the Exact Time by Phone in Chelyabinsk Tele2 Free|how to Find out the Exact Moscow Time on a Mobile Phone Tele2

But what to do if you don’t have a watch on your hands, the battery on your mobile phone is dead and there’s only a landline phone nearby? It turns out that there is a special service that can tell you the exact time by calling. Let's figure out how to find out the exact time by phone.