Do you automatically know how to convert the time to military hours?

[GoldenHours]

At work we always have to refer to military time/a 24 hour clock. I often see people having to count with their fingers to what the time is (e.g. counting that 8pm is 20:00). Similarly, with months I see people having to count with their fingers what number month it is when writing the date (e.g. counting to see that August is the 8th month).

Do you know the time in 24 hours and the number of the months off-by-heart or do you have to count it?

00:00

I agree — once you use it regularly, 24-hour time and month numbers become second nature. I don't even think about it anymore.
But I've found that some date conversions aren't so straightforward. Since moving to Saudi Arabia, I often have to deal with both the Gregorian and Hijri calendars. Filling out official forms, school applications, or even banking documents sometimes requires a Hijri date, and it's not something you can just "work out" in your head like 8pm = 20:00.
For that, I usually rely on an online tool to convert dates between the two calendars. It's been a lifesaver for avoiding mistakes on paperwork. Anyone else here ever have to juggle different calendar systems?

Yes, I remember being taught it at school too and how to read a timetable.

I taught myself as a child through teletext world clock