Vow to Fast the White Nights

Question
I have made a vow to fast for Allah during the white nights as long as I am alive, and sometimes I find it difficult, especially when the weather is hot. Is there a fatwa on this?
Answer
I say, and with God's success: You are required to fast it for the rest of your life, and there is a great reward for you in it. If you are unable to fast it for some reason, it can be made up on another day, and God knows best.
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