Get out of the office early.Make sure you inform your managers and co-workers that you will be leaving early. Do something fun since you are out early from work. Go for a movie or the happy hour at your favorite restaurant or bar with your co-workers.
There’s a department at my workplace where this is common practice too. My old department worked with clients in similar ways, and I was half expecting we’d also be required to do it, but luckily that never happened. Further proof that, at this (generally progressive, flexible-working) company, your actual work-life balance heavily depends who manages you.

TEMPLATE #1. (Office closed for holiday notice: Memo to all employees) Dear All, Please note that our office will be closed on (day), (date) because of the (mention reason). The office will then open as usual on the next working day. This is for your kind information. Do spread this info among other colleagues.
COMPLETELY agree. Every time I see an OOO for a two-hour doctor’s appointment I have to fight the urge to reply with “How much are you paid?” because I know there is no scenario in which I would have to explain myself if I don’t answer an email for a few hours and if you are that important you better make a LOT more than I do.