"Sat, 03 Jan 1970 15:09:59"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
15:09:59
General datetime
1970-01-03 15:09:59Z
For Database
1970-01-03 15:09:59
For HTTP1.1
Sat, 03 Jan 1970 15:09:59 GMT