time.sourceforge.net/
ISO8601 Date Format: http://en.wikipedia.org/wiki/ISO_8601 Example usage: ISOin = LOAD 'test.tsv' USING PigStorage('\t') AS (datetime, dt2:datetime); DESCRIBE ISOin; ISOin: {dt: datetime,dt2: datetime} DUMP ISOin; (2009-01-07T01:07:01.000Z,2008-02-01T00:00:00.000Z) (2008-02-06T02:06:02.000Z,2008-02-01T00:00:00.000Z) (2007-03-05T03:05:03.000Z,2008-02-01T00:00:00.000Z) ... diffs = FOREACH ISOin GENERATE YearsBetween(dt, dt2) AS years, MonthsBetween(dt, dt2) AS months, WeeksBetween(dt, dt2) AS weeks, DaysBetween(dt, dt2) AS days, HoursBetween(dt, dt2) AS hours, MinutesBetween(dt, dt2) AS mins, SecondsBetween(dt, dt2) AS secs; MilliSecondsBetween(dt, dt2) AS millis; DESCRIBE diffs; diffs: {years: long,months: long,weeks: long,days: long,hours: long,mins: long,secs: long,millis: long} DUMP diffs; (0L,11L,48L,341L,8185L,491107L,29466421L,29466421000L) (0L,0L,0L,5L,122L,7326L,439562L,439562000L) (0L,-10L,-47L,-332L,-7988L,-479334L,-28760097L,-28760097000L)