"Sat, 17 Jan 1970 15:06:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
15:06:00
General datetime
1970-01-17 15:06:00Z
For Database
1970-01-17 15:06:00
For HTTP1.1
Sat, 17 Jan 1970 15:06:00 GMT