@SIG@ or @DATE@ is replaced to DateTimeMacro.
[[DateTime(@date@)]]
[[DateTime(2003-12-31T16:06:00)]]
2026/02/16 02:30:12 GMT
2026-02-16 02:30:12
2004-10-11 18:16:39
2026-02-16 02:30:12
2004-10-11 18:16:39
[[DateTime(2003-12-31T16:06:00)]]