"Wed, 28 Jan 1970 15:13:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
15:13:02
General datetime
1970-01-28 15:13:02Z
For Database
1970-01-28 15:13:02
For HTTP1.1
Wed, 28 Jan 1970 15:13:02 GMT