2009.03.16 10:23
출처 : http://www.epochconverter.com/


Free unix timestamp and epoch conversion tool


The current Unix epoch time is   1207534309      

Convert epoch to human readable date and vice versa
   or  batch convert epochs to human dates

Mon Day Yr   Hr Min Sec
/   /      :   :   GMT    

   or  batch convert
Format: RFC 2822 formatted date

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

Mon Day Yr  
/   /       or  Epoch List By Month & Year

Convert seconds to days, hours and minutes
 
More date conversion tools
Calculate the difference between 2 dates

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. The epoch timestamp 0 can be written in ISO 8601 format as: 1970-01-01T00:00:00Z. One epoch hour is 3600 seconds, one epoch day is 86400 seconds long, leap seconds are not calculated. Many Unix 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).

Human readable time  Seconds
1 minute 60 seconds
1 hour 3600 seconds
1 day 86400 seconds
1 week 604800 seconds
1 month (30.44 days)  2629743 seconds
1 year (365.24 days)   31556926 seconds

How to get the current epoch time in ...
Perl time
PHP time()
Ruby Time.now (or Time.new). To display the epoch: Time.now.to_i
Python import time first, then time.time()
Java long epoch = System.currentTimeMillis()/1000;
Microsoft .NET C# epoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
VBScript/ASP DateDiff("s", "01/01/1970 00:00:00", Now())
MySQL SELECT unix_timestamp(now())
PostgreSQL SELECT extract(epoch FROM now());
SQL Server SELECT DATEDIFF(s, '19700101', GETDATE())
JavaScript Math.round(new Date().getTime()/1000.0) getTime() returns time in milliseconds.
Unix/Linux date +%s
Other OS's  Command line: perl -e "print time" (If Perl is installed on your system)

Convert from human readable date to epoch
Perl Use these Perl Epoch routines
PHP mktime(hour, minute, second, month, day, year)  
Ruby Time.local(year, month, day, hour, minute, second, usec ) (or Time.gm for GMT/UTC input). To display add .to_i
Python import time first, then int(time.mktime(time.strptime('2000-01-01 12:34:00', '%Y-%m-%d %H:%M:%S')))
Java long epoch = new java.text.SimpleDateFormat ("dd/MM/yyyy HH:mm:ss").parse("01/01/1970 01:00:00");
VBScript/ASP DateDiff("s", "01/01/1970 00:00:00", time field)  
MySQL SELECT unix_timestamp(time) Time format: YYYY-MM-DD HH:MM:SS or YYMMDD or YYYYMMDD  
PostgreSQL SELECT extract(epoch FROM date('2000-01-01 12:34'));
With timestamp: SELECT EXTRACT(EPOCH FROM TIMESTAMP WITH TIME ZONE '2001-02-16 20:38:40-08');
With interval: SELECT EXTRACT(EPOCH FROM INTERVAL '5 days 3 hours');
SQL Server SELECT DATEDIFF(s, '19700101', time field)
JavaScript use the JavaScript Date object
Unix/Linux date +%s -d"Jan 1, 1980 00:00:01"

Convert from epoch to human readable date
Perl Use these Perl Epoch routines
PHP date(output format, epoch); Output format example: 'r' = RFC 2822 date  
Ruby Time.at(epoch)
Python import time first, then time.gmtime(epoch) time is an array of year, month, day, hour, min, sec, day of week, day of year, DST  
Java String date = new java.text.SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(new java.util.Date (epoch*1000));
VBScript/ASP DateAdd("s", epoch, "01/01/1970 00:00:00")  
PostgreSQL SELECT TIMESTAMP WITH TIME ZONE 'epoch' + epoch * INTERVAL '1 second';  
MySQL from_unixtime(epoch, optional output format) The default output format is YYY-MM-DD HH:MM:SS  
SQL Server DATEADD(s, epoch, '19700101')
JavaScript use the JavaScript Date object
Linux date -d @1190000000 (replace 1190000000 with your epoch, needs newer version of date)
Other OS's Command line: perl -e "print scalar(localtime(epoch))" (If Perl is installed) Replace 'localtime' with 'gmtime' for GMT/UTC time.

Full screen epoch clock | Epoch Conversion Functions | Related Books
Esta página en Español: Convertir Epochs / Tiempos Unix
Please note: All tools on this page are based on the time settings of your computer.  

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