Yes. You can either convert the data to a uint64_t as you have showed above, or you can use the time_point types:
time_point
time_point_sec
block_timestamp_type
I believe of the above, time_point_sec is likely most common. time_point_sec is a lower resolution timestamp accurate to seconds.
time_point_sec format:
yyyy-MM-dd T HH:mm:ssz
time_point format:
yyyy-MM-dd T HH:mm:ss.SSSSSSz