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convert dateAndTime [from format [and format]] to format [and format]

Desktop, Web and Server
Platform Support
MacOS,Mac OS X,Windows,Linux
None required
Changes a date, a time, or a date and time to a specified format.

convert "11/22/90" to long english date
convert it from internet date to system date
convert lastChangedTime to abbreviated time and long date
convert the date && the time to seconds

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Use the convert command to change a date or time to a format that's more convenient for calculation or display.


The dateAndTime is a string or container with a date, a time, or a date and time separated by a space, tab, or return character.

The format is one of the following (examples are February 17, 2000 at 10:13:21 PM, in the Eastern time zone, using US date and time formats):

* short date: 2/17/00

* abbreviated date: Thu, Feb 17, 2000

* long date: Thursday, February 17, 2000

* short time: 10:13 PM

* abbreviated time: 10:13 PM

* long time: 10:13:21 PM

* internet date: Thu, 17 Feb 2000 22:13:21 -0500

* seconds: the number of seconds since the start of the eon

* dateItems: 2000,2,17,22,13,21,5

If you specify both a date and time format, they can be in either order and must be separated by a space. The resulting date and time are in the order you provided, separated by a space. If you specify seconds or dateItems, you can request only one format.


If the dateAndTime is a container, the converted date and time is placed in the container, replacing the previous contents. If the dateAndTime is a string, the converted date and time is placed in the it variable.

The dateItems format is a comma-separated list of numbers:

* the year

* the month number

* the day of the month

* the hour in 24-hour time

* the minute

* the second

* the numeric day of the week where Sunday is day 1, Monday is day 2, and so forth

The convert command can handle dates in dateItems format where one or more of the items is out of the normal range. This means you can add arbitrary numbers to an item in the dateItems and let the convert command handle the calculations that span minute, hour, day, month, and year boundaries.

For example, suppose you start with 9:30 AM , convert that time to dateItems format, then add 45 minutes to item 5 (the minute) of the resulting value. This gives you 75 as the minute. When you convert the value to any other time format, the convert command automatically converts "75 minutes" to "1 hour and 15 minutes":

convert "9:30 AM" to dateItems

add 45 to item 5 of it

convert it to time -- yields "10:15 AM"

You can optionally use the english or system keyword before the short, abbreviated, or long date or time. If the useSystemDate is true, or if you use the system keyword, the user's current system preferences are used to format the date or time. Otherwise, the standard US date and time formats are used.

The internet date, seconds, and dateItems formats are invariant and do not change according to the user's preferences.

Note: The convert command assumes all dates / times are in local time except for 'the seconds', which is taken to be universal time.

Note: If you convert a date without a time to a form that includes the time, the time will be given as midnight local time.

Note: The range of dates that the convertcommand can handle is limited by the operating system's date routines. In particular, Windows systems are limited to dates after 1/1/1970.

Changes to Revolution:

The ability to use the date and time format preferred by the user was introduced in version 1.1. In previous versions, the convert command, along with the time and date functions, consistently used the standard U.S. format, even if the operating system's settings specified another language or date and time format.

The ability to specify a format to convert from was introduced in version 1.1. In previous versions, Revolution automatically guessed the format to convert from.

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