"Sat, 03 Jan 1970 21:09:58"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
21:09:58
General datetime
1970-01-03 21:09:58Z
For Database
1970-01-03 21:09:58
For HTTP1.1
Sat, 03 Jan 1970 21:09:58 GMT