TTC CONCERN?

Sarah • 20 | Wife to Mr. Jeremy | my husband and I are TTC for the first time. Found this app in hopes that it could help us.💖
If my fiancé and I are trying to conceive on my fertile week and we have sex every other day like you're suppose to. If you try to conceive at midnight would that be considered that night or the next day? For example (Monday conceived Tuesday did not conceive wednesday conceived but at midnight) would that be considered Thursday or Wednesday night? I just want to properly log my TTC calander so I don't get mixed up.