ANSWER: It is not permissible to pray voluntary prayers when the sun is right in the middle of the sky, about 10 minutes before thuhur athan. There is no restriction in praying at anytime of the night till the athan of Fajr.   

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ANSWER: No problem.  The restriction is only in praying voluntary prayers during restricted times. You can do any other ibadah you want, no problem in that at all.   

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