Per Grok...
Yes, a college basketball player can enter the transfer portal on the day it closes, as long as they submit their entry before the deadline. The NCAA transfer portal has specific windows, typically closing in mid-April for basketball (e.g., April 16, 2025, based on recent cycles). Entries must be finalized by 11:59 p.m. local time on the closing date.
Just over 24 hours left in the anxiety department.