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Date and Time Functions

List of date and time functions

  • NOW
  • CURDATE
  • CURTIME
  • DATE
  • DATEDIFF
  • DATE_COMPUTE
  • DAY
  • MONTH
  • YEAR
  • WEEKDAY
Within DecisionRules functions, date and time are represented by a date/time ISO string. Functions generating date like NOW or DATE therefore return string which can be then picked up by other date functions. On the other hand, most of the other date functions return numbers, like DATEDIFF, DAY, MONTH or YEAR.

Now (NOW)

Returns the current date and time.
  • Takes 1 optional argument.
  • When present, the optional argument specifies time zone.
input = "+02:00"
​
[function] ---> [output]
​
NOW() ---> "2021-06-01T11:01"
NOW("+08:00") ---> "2021-06-01T19:01"
NOW("-08:00") ---> "2021-06-01T03:01"
NOW({input}) ---> "2021-06-01T13:01"
​
NOW(1) ---> invalid
NOW("abc") ---> invalid

Current date (CURDATE)

Returns the current date.
  • Takes 1 optional argument.
  • When present, the optional argument specifies time zone.
input = "+02:00"
​
[function] ---> [output]
​
CURDATE() ---> "2021-06-01"
CURDATE("+08:00") ---> "2021-06-01"
CURDATE("-02:00") ---> "2021-06-01"
CURDATE({input}) ---> "2021-06-01"
CURDATE("+10:00") ---> "2021-07-01"
​
CURDATE(1) ---> invalid
CURDATE("xx") ---> invalid

Current time (CURTIME)

Returns the current time.
  • Takes 1 optional argument.
  • When present, the optional argument specifies time zone.
input = "+02:00"
​
[function] ---> [output]
​
CURTIME() ---> "11:16"
CURTIME("-02:00") ---> "09:16"
CURTIME("+08:00") ---> "19:16"
CURTIME({input}) ---> "13:16"
​
CURTIME(1) ---> invalid
CURTIME("xx") ---> invalid

Date (DATE)

Takes a string and returns a date (a date ISO string that can be picked up by other functions). The returned date and time are localized to UTC.
  • Takes 1 or 2 arguments.
  • The first argument is a string representing a date.
  • The second optional argument specifies custom format of the given date.
For details on how to write the second parameter specifying the date format, please see the Day.js Documentation.
input = "12/25/2021"
​
[function] ---> [output]
​
DATE("2021-12-25T23:00") ---> "2021-12-25T23:00"
DATE("12/25/2021") ---> "2021-12-25T23:00"
DATE("12.25.2021") ---> "2021-12-25T23:00"
DATE("2.20.2022 GMT+3") ---> "2022-02-19T21:00"
DATE("2.20.2022 15:00 GMT+3") ---> "2022-02-20T12:00"
DATE({input}) ---> "2021-12-25T23:00"
​
DATE("18/06/2022T08:15","DD/MM/YYYYTHH:mm") ---> 2022-06-18T06:15
DATE("18.06.2022 08:15 +03:00","DD.MM.YYYY HH:mm Z") ---> 2022-06-18T05:15
​
DATE() ---> invalid
DATE(12/25/2021) ---> invalid
Note that the function returns the result even for an invalid date as follows:
  • The values for the day can take 1-31 (depending on the month). If the range is exceeded, it will bubble up to the next month.
  • The values for the month can take 0-11 (Months are zero indexed, so January is month 0). If the range is exceeded, it will bubble up to the next year.
[function] ---> [output]
​
//Invalid day
DATE("2021-12-33T22:00") ---> "2022-01-02T21:00"
DATE("02/30/2022") ---> "2022-03-01T23:00"
​
//Invalid month
DATE("2023-13-30T22:00") ---> "2024-01-30T21:00"
DATE("2022-18-04T12:00") ---> "2023-06-04T10:00"

Date compute (DATE_COMPUTE)

Takes a date and adds or subtracts a specified time.
  • Takes 2 arguments.
  • The first argument is a date (obtained from DATE or NOW).
  • The second argument is the number of days to add.
input = "12/01/2021"
[function] ---> [output]
​
DATE_COMPUTE(DATE("12/01/2021"), "+20") ---> "2021-12-21"
DATE_COMPUTE(DATE({input}), +20) ---> "2021-12-21"
DATE_COMPUTE(DATE("12/30/2021"), "-20") ---> "2021-12-10"
​
DATE_COMPUTE(DATE("12/01/2021")) ---> invalid
DATE_COMPUTE() ---> invalid

Day (DAY)

Gets the day of the month for a given date.
  • Takes 1 argument.
  • The argument is a date (obtained from DATE or NOW).
input = "12/01/2021"
​
[function] ---> [output]
​
DAY(DATE("12/31/2015")) --> 31
DAY(DATE({input})) --> 31
​
DAY() --> invalid

Month (MONTH)

Gets the month of the year for a given date.
  • Takes 1 argument.
  • The argument is a date (obtained from DATE or NOW).
input = "12/01/2021"
[function] ---> [output]
​
MONTH(DATE("12/01/2021")) --> 12
MONTH(DATE({input})) --> 12
​
MONTH() --> invalid

Year (YEAR)

Gets the year of a given date.
  • Takes 1 argument.
  • The argument is a date (obtained from DATE or NOW).
input = "12/01/2021"
​
[function] ---> [output]
​
YEAR(DATE("12/31/2015")) --> 2015
YEAR(DATE({input})) --> 2021
​
YEAR() --> invalid

Weekday (WEEKDAY)

Finds the day of the week of the given date.
  • Takes 1 argument.
  • The argument is a date (obtained from DATE or NOW).
The WEEKDAY function returns a number from 0 (meaning Sunday) to 6 (meaning Saturday).
input = "12/01/2021"
​
[function] ---> [output]
​
WEEKDAY(DATE("09/05/2022")) --> 1 (Monday)
WEEKDAY(DATE({input})) --> 3 (Wednesday)
​
WEEKDAY() --> invalid

Date difference (DATEDIFF)

Returns the number of specified time units between two dates. It may return negative or positive numbers, based on the order of the dates.
  • Takes 3 arguments.
  • The first and second argument is a date.
  • The third argument specifies the time unit, as listed below.
"s" -- seconds
"m" -- minutes
"H" -- hours
"D" -- days
"W" -- weeks
"M" -- months
"Y" -- years
input = "01/02/2016"
​
[function] ---> [output]
​
DATEDIFF(DATE("01/31/2020"), DATE("01/31/2021"), "D") ---> -366
DATEDIFF(DATE("01/31/2021"), DATE("01/31/2020"), "D") ---> 366
DATEDIFF(DATE("01/31/2021"), DATE("01/31/2020"), "M") ---> 12
DATEDIFF(DATE("01/31/2021"), DATE("01/31/2020"), "Y") ---> 1
DATEDIFF(DATE({input}), DATE("12/30/2015"), "D") ---> 3
​
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Last modified 3mo ago