In INTRA Multicast, the timestamp data format for INTRA Multicast must be treated as UNIX epoch time. These are some examples:
Timestamp(1)
8 bytes represent only the date, example:
1494478800000 corresponds to 5/11/2017, 12:00:00 AM in Mexico time.
Timestamp(2)
8 bytes represent the date and hour with a precision of seconds, example:
1494509063000 corresponds to 5/11/2017, 8:24:23 AM in Mexico time.
Timestamp(3)
8 bytes represent the date and hour with a precision of milliseconds, example:
1494509063111 corresponds to 5/11/2017, 8:24:23.111 AM in Mexico time.
In order to validate the above, it is possible to use a converter such as the one available in the following link: https://www.epochconverter.com/.