Short answer
The best time to send marketing SMS is within the recipient's local daytime and outside legal quiet hours, then refined by testing on your own audience. In the UAE, TDRA bars marketing SMS between 21:00 and 07:00. In Saudi Arabia, CST bans promotional messages from 22:00 to 09:00, and from 01:00 to 12:00 during Ramadan.
What are the legal sending windows in the GCC?
Transactional messages such as OTPs and alerts can be sent at any time. Rules change, so confirm the current text with the regulator before scheduling.
| Country | Promotional SMS not allowed | Source |
|---|---|---|
| UAE | 21:00 to 07:00 UAE time | TDRA spam policy |
| Saudi Arabia | 22:00 to 09:00; 01:00 to 12:00 in Ramadan | CST spam regulations |
| Qatar | 21:00 to 09:00 | CRA Spam Regulation |
How do I pick the right time within those hours?
No universal best hour exists. Match the time to the action you want: a lunch offer before midday, a weekend sale on the evening before, a payment reminder during working hours. GCC weekends and Ramadan routines differ by country, so plan per market.
- Start from the legal window in the recipient's time zone.
- Shortlist two or three times that fit the offer.
- Split a sample of your list and send at each time.
- Compare clicks and conversions, not just delivery.
- Use the winning time for the full send and re-test periodically.
What mistakes push sends into quiet hours?
- Scheduling in the sender's time zone: 20:30 in Cairo is 21:30 in Dubai.
- Starting a large campaign late, so the tail runs past the cut-off.
- Forgetting that Ramadan changes the Saudi window.
How do I schedule several markets?
OmniChannels.ai campaigns support scheduling and auto-schedule sending, so you can queue each market at its own local time.