"Sat, 10 Jan 1970 07:48:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
07:48:20
General datetime
1970-01-10 07:48:20Z
For Database
1970-01-10 07:48:20
For HTTP1.1
Sat, 10 Jan 1970 07:48:20 GMT