The RTA has announced the timings for all of the Dubai public transport services over the Eid al Adha holiday period. This runs from Thursday 31st August until Saturday 3rd September.
The announcement confirms that there will be no changes to the running hours of the Dubai Tram over the weekend. You can check out the running times in the FAQs.
Some services will be extended on other means of public transport (including the Dubai Metro for which you can find the details here), but not for the tram.
However, paid parking will be free (except for multi storey car parks) over the holiday period. Paid parking will resume on Monday 4th September.