I have been out a very long time and was a full time reservist for over 5 years and have worked in the Reg Force world and the Res Force world during my various call outs.
At the Army HQ there was no CTO or any time off given in my section to equal out the time we spent doing the Res Parade nights at the HQ, it was Thursday night from 1900 till 2230 every week and one weekend a month. Other sections were given CTO or time off to do admin, my section was not given any, it was up the section commander to decide if CTO was given ( I worked in a section where I was the only person who did my trade and was told it was part of the job, deal with or I would be replaced. My opinion was of that I was a FIN clk in ADM clk world and did not know what I did, thought I was Adm clerk who did not do typing or other Adm work, but they could nto do a travel claim if they tried).
When I was tasked to work at the Res Regiment, I was told my work day started at 0700 for PT Tuesday to Friday till 1600
On parade nights I was expected in my office for 1900 till 2200 ( usually had to do some paper work and set up the sign in location so I started at 1830 )two times a week, Tuesdays and Fridays, plus training weekends, at least one a month. To make up for this extra time I was given Mondays off, which was great since I lived in barracks, I had full use of both washers and dryers during the day , could get all my kit cleaned and ready for the week coming. I ended up working more weekends as the COs driver but he made up the extra time by giving me short leave , or telling me to fill out a leave pass but it would only count if I was hurt or something else came out. When I came back off this unoffical leave the pass would be tossed and the days off would be forgotten about as if they never took place.
I have worked in both worlds and the Mondays off each week were great but not every CO would be as willing to do that.