Right now it's on the 1:00-24:00 time thing which I somehow always manage to calculate wrong, so I miss events (and sorry if this post looks really strange, the new forum posting is doing weird things for me)
Oh, yeah, I thought the 24 hour thing was technically classified as a time zone, sorry. I was confused why it said it was in my time zone yet looked like that...
I'll try to figure out the 24 hour thing, thanks for the tip
Technically, there is a time zone, sometimes called Zulu time, that officially uses the 24-hour format.
In Japan, I’ve seen times like 27:59 used to advertise opening hours for all-night restaurants and bars.
Yeah, those are a little confusing to me, even though I know 24-hour very well :D
I can tell that's 3:59 AM though. Isn't Japan the only country that does this? I don't think I've seen it anywhere else.
PS: Pretty sure Zulu is basically UTC+0. I'm in UTC+2. We also officially use the 24-hours format, with 12-hour being common in spoken language (we don't have AM/PM though).
@OP sorry for rambling about time-zones on your post
Oh, yeah, I thought the 24 hour thing was technically classified as a time zone, sorry. I was confused why it said it was in my time zone yet looked like that...
I'll try to figure out the 24 hour thing, thanks for the tip
It’s used a lot in Japan, so that's a good reason to learn it :)
Maybe they meant "time-format", not "time-zone"? I don't think you can switch to 12-hour.
00:00 – 11:59 → AM
12:00 – 23:59 → PM — With these (for the most part) you can just take the number on the left and subtract 2 (not mathematically, it's a visual trick).
13:00 = 13 - 2 = (1)1 PM
15:00 = 15 - 2 = (1)3 PM
21:00 = 21 - 2 = (1)9 PM
There are a few exceptions, but that's how I like to teach people. It's not as demanding as subtracting 12, since it's more of a pattern.
That is actually still math, as by ignoring the 1 on the left, you are subtracting the 10 that the 1 represents, subtracting 12 in total, as is correct.
I know, it's just easier (imo) for most people. Point was you can just look at 15:00 and go "5, 4, 3 PM", without thinking too much. I knew saying "not mathematically" was inaccurate/a simplification, but didn't think anyone would care all that much about it.
This is meant for people who don't like math after all :D
There are a few ways you can look at the math, but I haven't done any conversion (programmatically) in quite some time:
12−((−H)mod12) ← needs true modulo
((H+11)mod12)+1 ← works with %
I feel like non-math people won't be a fan of me explaining modular arithmetic though
PS: Pretty sure Zulu is basically UTC+0. I'm in UTC+2. We also officially use the 24-hours format, with 12-hour being common in spoken language (we don't have AM/PM though).
Yes, it means nothing more than zero offset from UTC. But these single-letter zone designations like Z (zulu) for +0 or B (bravo) for +2 are simply never used with 12-hour clock, so these notions are normally conflated like that in colloquial usage. It's often associated with its military use and in American English the phrase military time also means 24-hour clock no matter if otherwise formatted in accordance with the communications manual or not.
