could you please let me know the exact time for intercourse on that particular day?
The answer is in the notes at the bottom of your Calendar:
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It is necessary to allow time for the sperm to travel to reach the egg (about 12 hours). For instance, if the exact phase of the Moon (Jonas method) occurs at 11:43 AM, a sexual intercourse or artificial insemination must take place the night before so that spermatozoids are present where they need to be at the moment of maximum fertility