Certain fields 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 `created`

and `modified`

.

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

- New in: 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.

As an example, the `created`

field of this tiddler has the value `20150117190213631`

.

Dates can be converted to other formats for display:

`<$view field="created" format="date" template="DDD DDth MMM YYYY"/>`

That renders as:

Saturday 17th January 2015