The best time for me is Monday, Thursday, and Friday early in the morning or late afternoon.
Unless you mean anytime on Monday and Thursday but at the limited times on Friday, I would change it so there’s no ambiguity about whether or not the morning/afternoon part applies to the three days or just Friday:
The best time for me is either early morning or late afternoon on Monday(s), Thursday(s) and/or Friday(s).
Use ‘and’ plus the plural days if you are talking about the best time in any week.
Ise ‘or’ plus the singular days if you are talking about the coming week only.
oh~~ thank you so much!!!