"Sat, 31 Jan 1970 07:24:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
07:24:48
General datetime
1970-01-31 07:24:48Z
For Database
1970-01-31 07:24:48
For HTTP1.1
Sat, 31 Jan 1970 07:24:48 GMT