"Thu, 15 Jan 1970 07:48:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
07:48:20
General datetime
1970-01-15 07:48:20Z
For Database
1970-01-15 07:48:20
For HTTP1.1
Thu, 15 Jan 1970 07:48:20 GMT