"Wed, 07 Jan 1970 00:55:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
00:55:54
General datetime
1970-01-07 00:55:54Z
For Database
1970-01-07 00:55:54
For HTTP1.1
Wed, 07 Jan 1970 00:55:54 GMT