The text format of dates must follow the following ISO 8601:2000-compliant format:



sYYYY Four-digit year with optional leading positive (‘+’) or negative (‘-’) sign. A negative sign indicates a year BCE. The absence of a sign or the presence of a positive sign indicates a year CE (for example, -0055 would indicate the year 55 BCE, while +1969 and 1969 indicate the year 1969 CE).

MM Two-digit month (01 = January, etc.)

DD Two-digit day of month (01 through 31)

hh Two digits of hour (00 through 23)

mm Two digits of minute (00 through 59)

ss.sss Seconds, to three decimal places (00.000
through 59.999)

TZD Time zone designator (either Z for Zulu, i.e. UTC, or
+hh:mm or -hh:mm, i.e. an offset from UTC)

Note that the "T" separating the date from the time and the separators "-" and ":" appear literally in the string. See http://www.w3.org/TR/NOTE-datetime for more information.