"Wed, 07 Jan 1970 23:33:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
23:33:37
General datetime
1970-01-07 23:33:37Z
For Database
1970-01-07 23:33:37
For HTTP1.1
Wed, 07 Jan 1970 23:33:37 GMT