DiceyCZ wrote: ↑Mon Jun 29, 2020 6:09 amUTC is not GMT and british time is not GMT. UTC as universal time standard does not change with DST, during DST changes you are for example always UTC+1 regardless of winter/summer time. GMT on the other hand is different, while GMT+0 doesn't move from UTC+0 your country switches between GMT+1 and GMT+2 and you should always know if you are GMT+1 or +2 and likewise the forum uses GMT and not UTC and switches accordingly when appropriate based on your location and DST table info. So, if you reference GMT as time base, it doesn't matter when anyone switches DST because you know if you are GMT+1 or GMT+2 and they know if they are GMT-5 or -6 at the time, since the baseline is the same, you just need to alter your own calculation.
Okay, let's break this down...
UTC is not GMT
Technically true, but the distinction is irrelevant in the context of this discussion, as the difference between the two is never more than a second. (With this in mind, it's unsurprising that the two are often used interchangeably.)
and british time is not GMT.
While technically true, I have seen people use those terms interchangeably. There was a time when I consistently counted myself among those people.
UTC as universal time standard does not change with DST,
True...
during DST changes you are for example always UTC+1 regardless of winter/summer time.
Wrong. CEST, my current timezone, corresponds to UTC+2. At some date I still haven't committed to memory, I will go back to CET, which is UTC+1.
GMT on the other hand is different, while GMT+0 doesn't move from UTC+0 your country switches between GMT+1 and GMT+2
Or between UTC+1 and UTC+2, as per my previous remarks.
and you should always know if you are GMT+1 or +2
Therein lies the core of my complaint. In a perfect world, DST would apply consistently across the globe (thus reducing the amount of situations where knowledge of the DST switchover dates was relevant), or not at all. Like I said, it's not something Zanniej has any control over.
Also, as I'll point out later, I may need to know whether someone else is currently on DST, too.
and likewise the forum uses GMT and not UTC and switches accordingly when appropriate based on your location and DST table info.
Technically true, aside from once again unnecessarily emphasizing a distinction without a (meaningful) difference.
So, if you reference GMT as time base, it doesn't matter when anyone switches DST because you know if you are GMT+1 or GMT+2
I don't, though. It's taken me weeks (months?) to get "Oh hey, DST is back on/off now" through my thick skull.

It's been going on for years, ever since I first had to coordinate scheduling with people outside my own timezone.
and they know if they are GMT-5 or -6 at the time,
History has shown me that
they aren't always sure, either... or perhaps they just don't use unambiguous terminology like that. Far too often, it's just "Pacific time", "Eastern time", "Central time", or abbreviations of those which may or may not be accurate to their current DST status. (I actually had to check earlier if I was in CEST or CET...)
As an example of this, you can see c2k's post - EST doesn't change, but some regions using EST will temporarily switch to EDT during the year. Does he know? Does he care? Is he only echoing the ambiguous usage of others? Who knows?
since the baseline is the same, you just need to alter your own calculation.
TL;DR: If both sides do everything right, and provide their information in an unambiguous format, then sure, things work fine. In reality, it's rarely quite that simple.