During these days many Muslims fast from dawn until dusk. It's important to support the health, safety and wellbeing of all staff and you should give consideration during fasting.
For those fasting, concentrating for long periods can be challenging due to the physical impact of not eating for extended periods of time can have on the body and brain. Encourage staff to take regular breaks and rest periods whenever they need them. If any of your staff are Muslim, have a chat with them to see if there is anything they need supported with during this religious time.