@SIG@ or @DATE@ is replaced to DateTimeMacro.
[[DateTime(@date@)]][[DateTime(2003-12-31T16:06:00)]]
2026/10/28 07:30:49 GMT
2026-10-28 07:30:49
2004-10-11 09:16:39
2026-10-28 07:30:49
2004-10-11 09:16:39
[[DateTime(@date@)]][[DateTime(2003-12-31T16:06:00)]]