"Wed, 07 Jan 1970 04:36:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
04:36:46
General datetime
1970-01-07 04:36:46Z
For Database
1970-01-07 04:36:46
For HTTP1.1
Wed, 07 Jan 1970 04:36:46 GMT