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Explanation: I think the extra context posted in the discussion area makes this quite clear. DST, Daylight Saving Time, refers to summer time; in fact in the UK it is called BST, British Summer Time. So right now DST is in effect in the UK, though it soon won't be.
As Sheila has observed, this year, 2011, DST ceases in the UK at 2 am on Sunday 30 October, when it will instantly become 1 am, and UK time will be GMT (1 hour behind BST/DST) for the winter. http://wwp.britishsummertime.co.uk/
The context refers to a poker tournament run by a UK-based website. The relevant sentence reads:
"From the 1st of November the €10,000/€12,000 GTD REBUY; which runs every night at 20:00 GMT (Post-DST), will change to a €10,000 GUARANTEED HEADHUNTER". http://www.dusktilldawnpoker.com/head-master-leaderboard.php
Is this 19:00 GMT or 19:00 UK time (currently DST)? It is GMT; we can tell this from the fact that the daily 1,000 € guaranteed Omaha pot limit game, which appears in this table at 19:30, is separately advertised as taking place at "7:30pm GMT / 8:30pm UK Time" ( http://www.dusktilldawnpoker.com/tournaments/1000-guaranteed ). It makes sense, really, to use GMT for the timings, because people from other countries are probably playing, and to use UK time might well cause confusion.
So then the €10,000 guaranteed rebuy takes place at 19:00 GMT, which is currently 20:00 UK time (DST). But on 1 November, when it changes to a €10,000 GUARANTEED HEADHUNTER, it will be at 20:00 GMT, which by then will be 20:00 UK time. So they are keeping it at the same time in terms of UK time, but when the clocks go back this will change from 19:00 GMT (20:00 DST) to 20:00 GMT. So 20:00 GMT refers here to the time after DST has ceased (on 30 October). That is the meaning of "Post DST".
-------------------------------------------------- Note added at 11 hrs (2011-10-14 22:53:17 GMT) --------------------------------------------------
I may say that when you look at references to DST on the Internet you find that a lot of people are confused about it and think that DST is winter time, starting in November. The opposite is true: it is summer time. The "daylight saving" is the result of putting the clocks forward, so you get lighter evenings (it stays light later, by the clock, than if you did not put the clocks forward).
-------------------------------------------------- Note added at 11 hrs (2011-10-14 22:59:04 GMT) --------------------------------------------------
I did not make it explicit that the phrase "post DST" is present here precisely because the time of this tournament will change in terms of GMT from 19:00 to 20:00 at the moment DST ceases. So it is only 20:00 GMT after that, not before: in other words, post DST.
There could be a lot of money hanging on the exact meaning of this time. The UK is at present on BST (GMT+1) but will change back to GMT on the last Sunday of October. That is clearly of importance here, but I wouldn't like to say EXACTLT what the author is trying to say. I would check, personally.
Please see http://www.dusktilldawnpoker.com/head-master-leaderboard.php
From the 1st of November the €10,000/€12,000 GTD REBUY; which runs every night at 20:00 GMT (Post-DST).
The daily tournament that counts towards the Leaderboard is the "€10,000 HEADHUNTER" at 20:00 GMT (Post DST)
Do we even know for sure that 'post' has a temporal sense here? Only more context could tell us — suppose this were a post on a website, and it was trying to tell us that even though the current time here is now X GMT, this post was made at a time of Y under DST... ?
Automatic update in 00:
Answers
10 mins confidence: peer agreement (net): +1
post dst
after dst
Explanation: It seems to me that the author means "after DST comes into effect". That is, the particular time referred to continues to be 20:00 GMT (unaffected by DST).
adj : (prefix) coming after; "`post' is a prefix in `postmillenial' and `postgraduate'"
-------------------------------------------------- Note added at 1 hr (2011-10-14 13:04:54 GMT) --------------------------------------------------
I would agree with Sheila and Tony. The term is so vague, and potentially important, that you should check with the source.
Martin Riordan Brazil Local time: 22:04 Native speaker of: English, Portuguese PRO pts in category: 36
Notes to answerer
Asker: Thank you for the answer! It is (and was) very clear that "post" means "after". The problem is somewhat different and "after daylight saving time" does not seem to solve it. Your explanation "after DST comes into effect" meaning "during daylight saving time period" is OK. However, the discussion posts seem to have some doubts (me too).
Asker: Sorry about that.
Asker: I wish I could check with the source. Thank you for your input!
Explanation: I think the extra context posted in the discussion area makes this quite clear. DST, Daylight Saving Time, refers to summer time; in fact in the UK it is called BST, British Summer Time. So right now DST is in effect in the UK, though it soon won't be.
As Sheila has observed, this year, 2011, DST ceases in the UK at 2 am on Sunday 30 October, when it will instantly become 1 am, and UK time will be GMT (1 hour behind BST/DST) for the winter. http://wwp.britishsummertime.co.uk/
The context refers to a poker tournament run by a UK-based website. The relevant sentence reads:
"From the 1st of November the €10,000/€12,000 GTD REBUY; which runs every night at 20:00 GMT (Post-DST), will change to a €10,000 GUARANTEED HEADHUNTER". http://www.dusktilldawnpoker.com/head-master-leaderboard.php
Is this 19:00 GMT or 19:00 UK time (currently DST)? It is GMT; we can tell this from the fact that the daily 1,000 € guaranteed Omaha pot limit game, which appears in this table at 19:30, is separately advertised as taking place at "7:30pm GMT / 8:30pm UK Time" ( http://www.dusktilldawnpoker.com/tournaments/1000-guaranteed ). It makes sense, really, to use GMT for the timings, because people from other countries are probably playing, and to use UK time might well cause confusion.
So then the €10,000 guaranteed rebuy takes place at 19:00 GMT, which is currently 20:00 UK time (DST). But on 1 November, when it changes to a €10,000 GUARANTEED HEADHUNTER, it will be at 20:00 GMT, which by then will be 20:00 UK time. So they are keeping it at the same time in terms of UK time, but when the clocks go back this will change from 19:00 GMT (20:00 DST) to 20:00 GMT. So 20:00 GMT refers here to the time after DST has ceased (on 30 October). That is the meaning of "Post DST".
-------------------------------------------------- Note added at 11 hrs (2011-10-14 22:53:17 GMT) --------------------------------------------------
I may say that when you look at references to DST on the Internet you find that a lot of people are confused about it and think that DST is winter time, starting in November. The opposite is true: it is summer time. The "daylight saving" is the result of putting the clocks forward, so you get lighter evenings (it stays light later, by the clock, than if you did not put the clocks forward).
-------------------------------------------------- Note added at 11 hrs (2011-10-14 22:59:04 GMT) --------------------------------------------------
I did not make it explicit that the phrase "post DST" is present here precisely because the time of this tournament will change in terms of GMT from 19:00 to 20:00 at the moment DST ceases. So it is only 20:00 GMT after that, not before: in other words, post DST.
Charles Davis Local time: 03:04 Works in field Native speaker of: English PRO pts in category: 60
The translation workplace 
peer agreement (net): +2
