"Sat, 03 Jan 1970 21:14:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
21:14:00
General datetime
1970-01-03 21:14:00Z
For Database
1970-01-03 21:14:00
For HTTP1.1
Sat, 03 Jan 1970 21:14:00 GMT