created: 20150117190213631
modified: 20230226144641763
tags: Concepts
title: Date Fields
type: text/vnd.tiddlywiki

Certain [[fields|TiddlerFields]] of a tiddler are used to store dates and times. TiddlyWiki supports dates from the year -9999 to the year 9999.

The two standard date fields are <<.field created>> and <<.field modified>>.

Values of date fields are 17 or 18-character strings:

* <<.from-version "5.1.23">> an optional minus sign `-` to indicate a negative year
* 4 digits for the year
* 2 digits for the month
* 2 digits for the day
* 2 digits for the hour
* 2 digits for the minute
* 2 digits for the second
* 3 digits for the millisecond

To avoid problems arising from differences of time zone, TiddlyWiki always uses [[UTC|https://en.wikipedia.org/wiki/Coordinated_Universal_Time]].

The [[DateFormat]] template for storage of dates in these fields is `[UTC]YYYY0MM0DD0hh0mm0ss0XXX`.

As an example, the <<.field created>> field of this tiddler has the value <<.value """<$view field="created"/>""">>.

Dates can be [[converted to other formats|DateFormat]] for display:

<$macrocall $name="wikitext-example-without-html"
src="""<$view field="created" format="date" template="DDD DDth MMM YYYY"/>""">