Freshman admissions in august

Hi, I’m an out of state senior interested in uw. I was pokin around on their undergraduate admissions page and saw what looked like a period, starting in August and ending in November, for prospective freshmen to apply to start second semester. What can anyone tell me about this?

This link shows Aug-Sept 1 for Jan admissions. Not sure if links work here, touch the freshman green bar and it opens the deadline chart. @Raizau

https://admit.washington.edu/Admission/Deadlines#freshmen