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Freeside stores most dates as "Unix time" - the number of seconds elapsed since midnight UTC on the morning of January 1, 1970, not counting leap seconds.

Conversion in Perl

  • Conversion from UNIX time: see the localtime function or the Date::Format module.
  • Conversion to UNIX time: see the Date::Parse or Time::Local modules, among others.

Conversion in PostgreSQL

  • Conversion from UNIX time (substitute in your own time zone, date field and output field name):
'epoch'::TIMESTAMP WITH TIME ZONE AT TIME ZONE 'PST' + _date_field * '1 second'::INTERVAL AS output_fieldname
  • Conversion to UNIX time:
EXTRACT( EPOCH FROM date_column )

Conversion in MySQL

  • Conversion to UNIX time:
UNIX_TIMESTAMP( date_column )

Conversion in Crystal Reports

  • Download the U2lwin32 user function library
  • Use the provided "EpochToDateTime" function
  • Works with Crystal Reports 11 by manually installing the U2lwin32.dll to Business Objects\Common\3.5\bin