"Wed, 07 Jan 1970 00:38:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
00:38:03
General datetime
1970-01-07 00:38:03Z
For Database
1970-01-07 00:38:03
For HTTP1.1
Wed, 07 Jan 1970 00:38:03 GMT