Time specified on payment advance tax

Dear experts

Is there time limit on payment of Advance tax on last due date? For Example 15th september is the last date of payment of advance tax.

If we deposit advance tax on 15th september at 7:30pm by online. is it consider on 15th or next day?

If we deposit advance tax on 15th september at 9:30pm by online. is it consider on 15th or next day?

Pls advice us according to as per income tax act and income tax Rule

Thanks