Present perfect for giving a reason

I'm at school and really tired. Someone asks me why I'm so sleepy. Can I answer with "I have studied all night" even though now is the next day and that night is now gone?

I'm at school and really tired. Someone asks me why I'm so sleepy. Can I answer with "I have studied all night" even though now is the next day and that night in now gone?

No, the proper tense is simple past as the night is over.

• I studied all night.

• I'm so sleepy because I studied all night. [it is now morning]