Date functions: Date functions
date_vars
Populate variables with today's date
USAGE: date_vars [VAR ...]
Global variables set: date_vars[] ...
datenum
Convert DATE to day NUMBER in C.E.
USAGE: datenum [DATE [VAR]]
day_of_week
Convert ISO date (YYYY-MM-DD) to day of the week (Sunday = 0)
USAGE: day_of_week DATE [shortname|dayname|VAR]
days_in_month
Return number of days in given month
USAGE: days_in_month [VAR] MONTHNUM [year]
Required functions: is_leap_year(), is_var()
Global variables set: days_in_month
daysdiff
Find the number of days between two dates
USAGE: daysdiff DATE1 DATE2 [VAR]
easter
Calculate Easter (and related dates) for any year
USAGE: easter [YEAR]
Variables set: Easter Palm_Sun Good_Fri Ash_Wed
eday
Get day number since the epoch (1970-01-01 = 1)
USAGE: eday YYYY-MM-DD[THH:MM:SS] [VAR]
REQUIRES: bash4.3, is_leap_year(), vshow()
eday2date
Convert eday (days since 1970-01-01) to date
USAGE: eday2date NUM [VAR]
err
Return from function with error message
USAGE: command || err ERRNUM [MESSAGE] || return
eseconds2date
Convert seconds since the epoch to ISO date
is_date
Return success if argument is a valid date
USAGE: is_date STRING ...
Required functions: days_in_month(), is_leap_year()
is_leap_year
Return successfully if YEAR (or current year) is a leap year
USAGE: is_leap_year [YEAR]
jday
Return day in year for given date
USAGE: jday DATE [VAR]
Required functions: is_date() is_leap_year() is_var() today() vshow()
month2num
Convert name of month to number
USAGE: month2num MONTHNAME [VAR]
num2month
Convert number to month name
USAGE: num2month MONTHNUMBER [VAR]
num2shortmonth
Convert number to abbreviated month name
USAGE: num2month MONTHNUMBER [VAR]
numdate
Convert day number to calendar date
USAGE: numdate DAYNUM [VAR]
parsedate
Parse various formats of date
USAGE: parsedate ...
qdate
Print information about a given date number
USAGE: qdate YYYYMMDD
random_date
Return random date in given range of years
USAGE: random_date FIRST LAST [VAR]
Global variables set: random_date [VAR]
showdate
Convert ISO date to English date
USAGE: showdate ISO_DATE [VAR]
split_date
Splite date[time] string into year month day [hour minute second]
USAGE: split_date STRING ...
Global variable set: split_date year month day [hour minute second]
today
Return today's date
USAGE: today [VAR]
COPYING
GNU GPL