Generally, we must not allow any employee to take leave with whatever reason they present bcz Employer has no concern Employee’s personal need or requirements and Employee has to think about how he/she can manage this i.e. study or other personal work. Bcz he already knows the rule, culture and atmosphere of company and while joining the Organization, he has agreed on the terms of Employment, so have to follow the same. Every single employee in Organization has to follow the rules/policy laid down and have to maintain in every condition. It is also the HR & Admin people’s duty to take care of atmosphere of Company/Organization and not allowing anyone to disobey the rules. And if one employee will allow to take leave for his/her personal work (Leave for Study also comes under Personal Work), then other will certainly ask the Employer to grant them leave for their work and more, and Employer can’t bear this at any cost.
Also these days every second/third employee is studying and needs time for it but it doesn’t mean employee can disobey the rule of employment or can ask/request for leave in this regard bcz it is a person problem and Employer have no concern with it.
I agree with Rajeshwari. He can work extra hours to compensate Saturday’s leave but with prior consent of your and his supervisor/ Boss. Henceforth, It is completely depends on you and on your Boss’s and on your company policy whether you allow him or not.
You said you are new and there is no proper HR setup in your Organization, in that case you need to discuss with your and his department supervisor and Boss on this. If the Boss’s are ready, you can ask the Employee to take half day leave but only when it is required most. But without taking proper consent of HOD’s, do not take any decision.
With closing of this response I would say NO, you should not allow him for this.