@SIG@ or @DATE@ is replaced to DateTimeMacro.
[[DateTime(@date@)]]
[[DateTime(2003-12-31T16:06:00)]]
2025/05/31 13:04:36 GMT
2025-05-31 13:04:36
2004-10-11 18:16:39
2025-05-31 13:04:36
2004-10-11 18:16:39
[[DateTime(2003-12-31T16:06:00)]]