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.

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

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"/>