"Sat, 03 Jan 1970 03:46:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
03:46:45
General datetime
1970-01-03 03:46:45Z
For Database
1970-01-03 03:46:45
For HTTP1.1
Sat, 03 Jan 1970 03:46:45 GMT