Hey @srm@cosmoquest.in47! You can schedule a broadcast in advance177, or use an event109 in a visual automation to add subscribers to an email sequence at a specific date & time (it's okay if the sequence only has one email in it).
(That said, please note we don't have a function for scheduling individual emails based on dates/times in subscriber custom fields at this time, if that's what you meant. But please feel free to file that as a feature suggestion here53!)