@SIG@ or @DATE@ is replaced to DateTimeMacro.
[[DateTime(@date@)]][[DateTime(2003-12-31T16:06:00)]]
2026/10/24 20:37:58 GMT
2026-10-24 20:37:58
2004-10-11 09:16:39
2026-10-24 20:37:58
2004-10-11 09:16:39
[[DateTime(@date@)]][[DateTime(2003-12-31T16:06:00)]]