Universal Time Code

Time

How to quickly convert UTC/GMT time to local time?

It takes one minute to transmit a complete time code. Most of the bits encode UTC time, day of year, year of century, and UT1 correction up to ±0.7 s. Like the WWVB time code, only the tens and units digits of the year are transmitted; unlike the WWVB time code, there is no direct indication for leap year. Thus, receivers assuming that year 00 is a leap year (correct for year 2000) will be incorrect in the year 2100. The time code presents UTC information in serial fashion at a rate of 1 pulse per second. The information carried by the time code includes the current minute, hour, and day of year. The time code also contains the 100-Hz frequency from the subcarrier. The 100-Hz frequency may be used as a standard with the same accuracy as the audio frequencies.

If you are working in an international company, you may need to know and deal with different local times of multiple zones. And to get the different local times, you need to use UTC/GMT time. Here this tutorial can tell you how to calculate the local time based on the UTC/GMT time in Excel.

UTC—Coordinated Universal TimeChrome canary browser download.

Universal Time Codes Roblox

GMT -- Greenwich Mean Time

Convert UTC/GMT time to local time with Kutools for Excel

Supposing there is a city—Tokyo whose local time is ahead 9 hours to GMT time, and you can convert the GMT time to its local time by following these steps:

1. Select a blank cell and enter the current GMT time into it, here take A2 for instances. To get the current GMT, you can take reference from this http://www.timeanddate.com/worldclock/

2. Select a blank cell and enter one formula of below, and press Enter to get the local time. See screenshot:

=A2 + TIME(9,0,0)

=A2 + (9 / 24)

Tips:

(1) In above formulas, 9 is the number of hours the local time ahead to GMT, and you can change it as you need, if the local time is backward to the GMT, you just can change the plus sign + to minus sign -.

(2) The formula =A2 + (9 / 24) will return a decimal number. For converting the decimal number to time, please select the decimal number, and click Home > Number Format > Time.

There is a handy tool – Formula Helper in Kutools for Excel, which includes multiple useful and powerful functions can help you do some complex calculation. And to convert GMT/UTC to local time, the Add hours to date of Formulas can do you a favor.

After free installing Kutools for Excel, please do as below:

1. Enter the GMT time into a blank cell, A2 for instance, and select a blank cell, B2, which will get the local time you want. See screenshot:

2. Click Kutools > Formula Helper > Formula Helper, then in the popping Formulas Helper dialog, select Add hours to date from the Choose a formula list, and in Arguments input section, select the GMT time to Date Time textbox, and enter the time difference between local time and GMT time in to Number textbox. See screenshot:

3. Click Ok, and the local time has been gotten. See screenshot:

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  • To post as a guest, your comment is unpublished.
    Oh boy.. Where do I start? Maybe simply by pointing out ..
    A) local time in many cases is not a simple offset throughout the whole year. ( DST, Daylight saving time )
    B) the local time definition may change from one year to the next due to political changes.
  • To post as a guest, your comment is unpublished.
    When UTC time is entered as a series of numbers (for example '1258119969'), you can use this formula to convert it to CST - [b]=(((D:D/60)/60)/24)+DATE(1970,1,1)-TIME(6,0,0)[/b] (where D equals the cell with the UTC time in it).
    [u][b]DateTimeUTC[/b][/u] [u][b]ConvertedTimeCST[/b][/u]
    1258119969 11/13/09 7:46 AM
    You can adjust for the time zone that you are in by changing the number is the TIME section. I have it set for CST so six hours are subtracted from the formula (GMT).
    I don't know if Kutools has a better way of doing this or not.
  • To post as a guest, your comment is unpublished.
    When UTC time is presented as a series of numbers (like this '1258119969' for example), use this formula - =(((D:D/60)/60)/24)+DATE(1970,1,1)-TIME(6,0,0) (where D equals the cell with the UTC time in it). Depending on what time zone you are in, you would adjust the TIME number. This example is for CST, so six hours was subtracted from the GMT formula.
    [u]DateTimeUTC[/u] [u]ConvertedTimeCST[/u]
    1258119969 11/13/09 7:46 AM
    I don't know if Kutools has a better way to do this or not.

Universal Time Code

The current Unix epoch time is

Convert epoch to human-readable date and vice versa

Universal Time Code Conversion



Also see our dynamic list of dates (1 day ago, next week, etc.)
Press c to clear all forms.

Epoch dates for the start and end of the year/month/day


Convert seconds to days, hours and minutes

What is epoch time?

The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z).Literally speaking the epoch is Unix time 0 (midnight 1/1/1970), but 'epoch' is often used as a synonym for Unix time.Some systems store epoch dates as a signed 32-bit integer, which might cause problems on January 19, 2038 (known as the Year 2038 problem or Y2038).The converter on this page converts timestamps in seconds (10-digit), milliseconds (13-digit) and microseconds (16-digit) to readable dates.

Human-readable time Seconds
1 hour3600 seconds
1 day86400 seconds
1 week604800 seconds
1 month (30.44 days) 2629743 seconds
1 year (365.24 days) 31556926 seconds

A Universal Time Codes 2020

How to get the current epoch time in ..

PHPtime()More PHP
Pythonimport time; time.time()Source
RubyTime.now (or Time.new). To display the epoch: Time.now.to_i
PerltimeMore Perl
Javalong epoch = System.currentTimeMillis()/1000; Returns epoch in seconds.
C#DateTimeOffset.Now.ToUnixTimeSeconds() (.NET Framework 4.6+/.NET Core), older versions: var epoch = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds;
Objective-C[[NSDate date] timeIntervalSince1970]; (returns double) or NSString *currentTimestamp = [NSString stringWithFormat:@'%f', [[NSDate date] timeIntervalSince1970]];
C++11double now = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch()).count();
Luaepoch = os.time([date])
VBScript/ASPSee the examples
AutoIT_DateDiff('s', '1970/01/01 00:00:00', _NowCalc())
DelphiEpoch := DateTimetoUnix(Now); Tested in Delphi 2010.
Ras.numeric(Sys.time())
Erlang/OTPerlang:system_time(seconds). (version 18+), older versions: calendar:datetime_to_gregorian_seconds(calendar:universal_time())-719528*24*3600.
MySQLSELECT unix_timestamp(now())More MySQL examples
PostgreSQLSELECT extract(epoch FROM now());
SQLiteSELECT strftime('%s', 'now');
Oracle PL/SQLSELECT (CAST(SYS_EXTRACT_UTC(SYSTIMESTAMP) AS DATE) - TO_DATE('01/01/1970','DD/MM/YYYY')) * 24 * 60 * 60 FROM DUAL;
SQL ServerSELECT DATEDIFF(s, '1970-01-01 00:00:00', GETUTCDATE())
IBM InformixSELECT dbinfo('utc_current') FROM sysmaster:sysdual;
JavaScriptMath.floor(new Date().getTime()/1000.0) The getTime method returns the time in milliseconds.
Visual FoxProDATETIME() - {^1970/01/01 00:00:00} Warning: time zones not handled correctly
Gotime.Now().Unix()More Go
Adobe ColdFusion<cfset epochTime = left(getTickcount(), 10)>
Tcl/Tkclock seconds
Unix/Linux Shelldate +%s
Solaris/usr/bin/nawk 'BEGIN {print srand()}' Solaris doesn't support date +%s, but the default seed value for nawk's random-number generator is the number of seconds since the epoch.
PowerShell[int][double]::Parse((Get-Date (get-date).touniversaltime() -UFormat %s))
Other OS's Command line: perl -e 'print time' (If Perl is installed on your system)

Convert from human-readable date to epoch

Universal Time Code Conversion

PHPstrtotime('15 November 2018') (converts most English date texts) or:
date_create('11/15/2018')->format('U') (using DateTime class) More PHP
Pythonimport calendar, time; calendar.timegm(time.strptime('2000-01-01 12:34:00', '%Y-%m-%d %H:%M:%S'))
RubyTime.local(year, month, day, hour, minute, second, usec ) (or Time.gm for GMT/UTC input). To display add .to_i
PerlUse the Perl Epoch routines
Javalong epoch = new java.text.SimpleDateFormat('MM/dd/yyyy HH:mm:ss').parse('01/01/1970 01:00:00').getTime() / 1000; Timestamp in seconds, remove '/1000' for milliseconds.
VBScript/ASPDateDiff('s', '01/01/1970 00:00:00', time field)More ASP
AutoIT_DateDiff('s', '1970/01/01 00:00:00', 'YYYY/MM/DD HH:MM:SS')
DelphiEpoch := DateTimeToUnix(StrToDateTime(myString));
CUse the C Epoch Converter routines
Ras.numeric(as.POSIXct('YYYY-MM-dd HH:mm:ss', tz = 'GMT', origin='1970-01-01')) The origin parameter is optional
GoExample code
RustSystemTime::now().duration_since(SystemTime::UNIX_EPOCH)
Adobe ColdFusionint(parseDateTime(datetime).getTime()/1000);
MySQLSELECT unix_timestamp(time) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD
More on using Epoch timestamps with MySQL
PostgreSQLSELECT extract(epoch FROM date('2000-01-01 12:34'));
With timestamp: SELECT EXTRACT(EPOCH FROM TIMESTAMP WITH TIME ZONE '2018-02-16 20:38:40-08');
With interval: SELECT EXTRACT(EPOCH FROM INTERVAL '5 days 3 hours');
SQLiteSELECT strftime('%s',timestring);
SQL ServerSELECT DATEDIFF(s, '1970-01-01 00:00:00', time field)
JavaScriptUse the JavaScript Date object
Unix/Linux Shelldate +%s -d'Jan 1, 1980 00:00:01' Replace '-d' with '-ud' to input in GMT/UTC time.

Convert from epoch to human-readable date

PHPdate(output format, epoch); Output format example: 'r' = RFC 2822 date, more PHP examples
Pythonimport time; time.strftime('%a, %d %b %Y %H:%M:%S +0000', time.localtime(epoch))Replace time.localtime with time.gmtime for GMT time. Or using datetime:import datetime; datetime.datetime.utcfromtimestamp(epoch).replace(tzinfo=datetime.timezone.utc)
RubyTime.at(epoch)
C#private string epoch2string(int epoch) {
return new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(epoch).ToShortDateString(); }
PerlUse the Perl Epoch routines
JavaString date = new java.text.SimpleDateFormat('MM/dd/yyyy HH:mm:ss').format(new java.util.Date (epoch*1000)); Epoch in seconds, remove '*1000' for milliseconds.
Luadatestring = os.date([format[,epoch]])
VBScript/ASPDateAdd('s', epoch, '01/01/1970 00:00:00')More ASP
AutoIT_DateAdd('s', $EpochSeconds , '1970/01/01 00:00:00')
DelphimyString := DateTimeToStr(UnixToDateTime(Epoch)); Where Epoch is a signed integer.
CUse the C Epoch Converter routines
Objective-CNSDate * myDate = [NSDate dateWithTimeIntervalSince1970:epoch]; NSLog(@'%@', date);
Ras.POSIXct(epoch, origin='1970-01-01', tz='GMT')
GoExample code
Adobe ColdFusionDateAdd('s',epoch,'1/1/1970');
MySQLFROM_UNIXTIME(epoch, optional output format) Default output format is YYY-MM-DD HH:MM:SS. If you need support for negative timestamps: DATE_FORMAT(DATE_ADD(FROM_UNIXTIME(0), interval -315619200 second),'%Y-%m-%d') (replace -315619200 with epoch) More MySQL
PostgreSQLPostgreSQL version 8.1 and higher: SELECT to_timestamp(epoch);Source Older versions: SELECT TIMESTAMP WITH TIME ZONE 'epoch' + epoch * INTERVAL '1 second';
SQLiteSELECT datetime(epoch_to_convert, 'unixepoch'); or local timezone: SELECT datetime(epoch_to_convert, 'unixepoch', 'localtime');
Oracle PL/SQLSELECT to_date('01-JAN-1970','dd-mon-yyyy')+(1526357743/60/60/24) from dual
Replace 1526357743 with epoch.
SQL ServerDATEADD(s, epoch, '1970-01-01 00:00:00')
IBM InformixSELECT dbinfo('utc_to_datetime',epoch) FROM sysmaster:sysdual;
Microsoft Excel / LibreOffice Calc=(A1 / 86400) + 25569 Format the result cell for date/time, the result will be in GMT time (A1 is the cell with the epoch number). For other time zones: =((A1 +/- time zone adjustment) / 86400) + 25569.
Crystal ReportsDateAdd('s', {EpochTimeStampField}-14400, #1/1/1970 00:00:00#) -14400 used for Eastern Standard Time. See Time Zones.
JavaScriptUse the JavaScript Date object
Tcl/Tkclock format 1325376000Documentation
MATLABdatestr(719529+TimeInSeconds/86400,'dd-mmm-yyyy HH:MM:SS')
IBM PureData System for Analyticsselect 996673954::int4::abstime::timestamp;
Unix/Linux Shelldate -d @1520000000 Replace 1520000000 with your epoch, needs recent version of 'date'. Replace '-d' with '-ud' for GMT/UTC time.
Mac OS Xdate -j -r 1520000000
PowerShellFunction get-epochDate ($epochDate){ [timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($epochDate)) }, then use: get-epochDate 1520000000. Works for Windows PowerShell v1 and v2
Other OS'sCommand line: perl -e 'print scalar(localtime(epoch))' (If Perl is installed) Replace 'localtime' with 'gmtime' for GMT/UTC time.


Thanks to everyone who sent me corrections and updates!

More date related programming examples: What's the current week number? - What's the current day number?

Please note: All tools on this page are based on the date & time settings of your computer and use JavaScript to convert times. Some browsers use the current DST (Daylight Saving Time) rules for all dates in history. JavaScript does not support leap seconds.