It's always been time since release. Nobody calculates time between things in this completely strange manner that you are. Also the format for time was already in place when you entered the conversation.
If it's a Friday at noon and you say "Let's get together in 3 days" no one says "So Sunday at noon? You know Friday, Saturday, Sunday."
No, that's not how dates and times work. That's 48 hours, 72 hours is 3 days which makes your meet a Monday.