I go on a Friday late afternoon (430pm) which is the last slot of the day at the public hospital outpatient clinic. The clinic doesn't run after office hours or on weekends.

Due to the above, and because I work full time, every time I have an appointment, my psychologist or a nurse writes out an official memo stating I was at the hospital for treatment. (It's a standard document in hospitals where I live) Which I then give to my boss and HR.

I'm fortunate that my boss doesn't mind me taking an hour early off work every alternate Friday as long as I produce a new hospital memo each time.

My psychologist tries to keep that slot open for me every alternate week as she knows that's the day where therapy will give minimum disruption to my work week.