"Sat, 03 Jan 1970 14:25:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
14:25:09
General datetime
1970-01-03 14:25:09Z
For Database
1970-01-03 14:25:09
For HTTP1.1
Sat, 03 Jan 1970 14:25:09 GMT