Time is an abstraction of dates and times. Time is stored internally as the number of seconds and nanoseconds since the Epoch, January 1, 1970 00:00 UTC. On some operating systems, this offset is allowed to be negative. Also see the library modules Date. The Time class treats GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time)[Yes, UTC really does stand for Coordinated Universal Time. There was a committee involved.] as equivalent. GMT is the older way of referring to these baseline times but persists in the names of calls on POSIX systems.
All times are stored with some number of nanoseconds. Be aware of this fact when comparing times with each other—times that are apparently equal when displayed may be different when compared.
Implements the extensions to the Time class that are described in the documentation for the time.rb library.
Constants
ZoneOffset = { 'UTC' => 0, # ISO 8601 'Z' => 0, # RFC 822 'UT' => 0, 'GMT' => 0, 'EST' => -5, 'EDT' => -4, 'CST' => -6, 'CDT' => -5, 'MST' => -7, 'MDT' => -6, 'PST' => -8, 'PDT' => -7, # Following definition of military zones is original one. # See RFC 1123 and RFC 2822 for the error in RFC 822. 'A' => +1, 'B' => +2, 'C' => +3, 'D' => +4, 'E' => +5, 'F' => +6, 'G' => +7, 'H' => +8, 'I' => +9, 'K' => +10, 'L' => +11, 'M' => +12, 'N' => -1, 'O' => -2, 'P' => -3, 'Q' => -4, 'R' => -5, 'S' => -6, 'T' => -7, 'U' => -8, 'V' => -9, 'W' => -10, 'X' => -11, 'Y' => -12, }
LeapYearMonthDays = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
CommonYearMonthDays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
MonthValue = { 'JAN' => 1, 'FEB' => 2, 'MAR' => 3, 'APR' => 4, 'MAY' => 5, 'JUN' => 6, 'JUL' => 7, 'AUG' => 8, 'SEP' => 9, 'OCT' =>10, 'NOV' =>11, 'DEC' =>12 }
RFC2822_DAY_NAME = [ 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat' ]
RFC2822_MONTH_NAME = [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec' ]