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A few months ago, we launched a web-based timeclock Azure application. The web app uses a timezone offset from UTC application setting to derive client local time display/events. Since the inception, I have been carefully planning on how to deal with DST and yesterday being the first time change, I set aside a couple of hours to make sure it worked.
The process was simple... change the web app config setting (for the timezone offset) to one less than the current setting. I tested it in development, works fine...tested on our demo/test server, works fine. So, all I needed to do on Azure was to modify the setting and restart the application...I did, and tested it and it looked fine. I was done, and felt pretty good about how smooth it went. 
Then, I get the email early this morning (the customer is a timezone ahead of us) that the timeclock was showing the wrong time!  But I could swear that it was right yesterday!  What was strange was that my cell phone and workstation times were different, and I just went with the cell phone time.
Now I have to wait until late this afternoon when everyone is logged out of the system to figure out exactly what is wrong. I have a feeling that the 'always on' feature has prevented the new setting from taking effect. It's going to be a fun afternoon! 
"Go forth into the source" - Neal Morse
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Everything should be stored in UTC, and be converted to/from local time in javascript using the client's timezone.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Yeah. What Richard said.
(+1 too)
I'm retired. There's a nap for that...
- Harvey
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It also depends upon where your client is - in America, for example, Arizona does not respect DST, so a client calling in from AZ Saturday, needs the same offset he/she needs today, but others around Arizona need the -1.
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In this case, all offices are in the same time zone. One of the key specs for the project was that it had to be tamper-proof for the users, so no client settings are used whatsoever except to get a difference of timezone adjusted server time and local time, used to run a javascript clock.
"Go forth into the source" - Neal Morse
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I don't think you are an idiot, but I do think you are storing up trouble for the future. As Richard Deeming says above, you should get all timezone data from the client system.
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Actually did read, sounds like a fun annoying case to track and fix. Looking forward to get the results on what caused the problem when you find it. ![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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I finally got it working. It turns out there is a big difference between applicationSettings and appSettings in .NET! I was using the wrong one!  It only seemed to be working since I was replacing the dll every time previous to this. Ah well, I learned something! 
"Go forth into the source" - Neal Morse
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Glad that you fixed it. 
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To make a squid laugh, do you give it ten tickles?
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Just spend time together, if you are well attunaed.
GCS d--- s-/++ a- C++++ U+++ P- L- E-- W++ N++ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t++ 5? X R++ tv-- b+ DI+++ D++ G e++>+++ h--- ++>+++ y+++* Weapons extension: ma- k++ F+2 X
If you think 'goto' is evil, try writing an Assembly program without JMP. -- TNCaver
"When you have eliminated the JavaScript, whatever remains must be an empty page." -- Mike Hankey
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To make it stop laughing, take it on a trip to the Kalamari desert.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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You dune that on porpoise, didn't ya?
/ravi
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Moi? I think you're Kraken up!
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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Nah, I'm just crabby.
/ravi
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Whew! I thought it may have been a cry for kelp.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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Perhaps you should find a self-help grouper.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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Agreed. Right now I'm just floundering.
/ravi
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No, you show it any film featuring Leslie[^]. 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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He's made more than one movie[^] me thinks.
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I suppose.
And to check out your theory, I imagine you would give it test tickles.
I'm retired. There's a nap for that...
- Harvey
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DAMN! I hoped somebody hadn't posted that. It was precisely what I wanted to say... 
Anything that is unrelated to elephants is irrelephant
Anonymous
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The problem with quotes on the internet is that you can never tell if they're genuine
Winston Churchill, 1944
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I'd just like a chance to prove that money can't make me happy.
Me, all the time
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Still trying to wrap his arm-arm-arm-arm-arm-arm-arm-arm around the joke, Sal the Squid considered it a waste of (digital) ink until, taking out his cephaloPod, he looked on the fishingNet for it's meaning, and was gladius he did, for the joke, full of chromatophores, which enabled the joke to change meaning to suit its posting, making it practically invisible to understanding it, when, alas, having a heart, nay 3 (as such squids do), he begrudgingly jet propolsioned a courtesy laugh.
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