@SIG@ or @DATE@ is replaced to DateTimeMacro.
[[DateTime(@date@)]]
[[DateTime(2003-12-31T16:06:00)]]
2026/01/26 21:58:43 GMT
2026-01-26 21:58:43
2004-10-11 18:16:39
2026-01-26 21:58:43
2004-10-11 18:16:39
[[DateTime(2003-12-31T16:06:00)]]