# Time Setup: Sunset Incorrect **URL:** \ **Category:** Issues\ **Created:** [December 23, 2021, 3:12am UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459 "2021-12-23T03:12:25Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![sbeerda](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sbeerda/32/2489_2.png) [@sbeerda](https://wled.discourse.group/u/sbeerda)\ **Post date:** [December 23, 2021, 3:12am UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/1 "2021-12-23T03:12:25Z")
This feature was working with my WLED Light bulbs and homemade LED Arches turning on at sunset and off at sunrise. But today I noticed that they didn’t turn on so I checked the Time setup page and noticed that instead of 1558 today it’s showing 00:00. However sunrise is showing correctly. Any ideas? ![IMG_3762](https://global.discourse-cdn.com/free1/uploads/wled/original/2X/9/9bb0b99d02c09943f8a4cc3860cd95b3af1ab3ac.jpeg) ---
**Author:** ![blazoncek](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/blazoncek/32/1886_2.png) [@blazoncek](https://wled.discourse.group/u/blazoncek)\ **Post date:** [December 23, 2021, 12:32pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/2 "2021-12-23T12:32:01Z")
WLED version? If 0.12 upgrade to 0.13-b6 ---
**Author:** ![sbeerda](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sbeerda/32/2489_2.png) [@sbeerda](https://wled.discourse.group/u/sbeerda)\ **Post date:** [December 23, 2021, 2:37pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/3 "2021-12-23T14:37:00Z")
Running 0.13.0-b6 on my led arches and 0.13.0-b4 on my athom bulbs ---
**Author:** ![blazoncek](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/blazoncek/32/1886_2.png) [@blazoncek](https://wled.discourse.group/u/blazoncek)\ **Post date:** [December 23, 2021, 3:21pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/4 "2021-12-23T15:21:52Z")
I can reproduce, but changing -120 just a bit resolves the issue. ---
**Author:** ![sbeerda](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sbeerda/32/2489_2.png) [@sbeerda](https://wled.discourse.group/u/sbeerda)\ **Post date:** [December 23, 2021, 3:24pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/5 "2021-12-23T15:24:39Z")
Thanks, I did try adjusting that a little yesterday but it didn’t fix. Just changed to -120.00 and it works. ---
**Author:** ![blazoncek](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/blazoncek/32/1886_2.png) [@blazoncek](https://wled.discourse.group/u/blazoncek)\ **Post date:** [December 23, 2021, 3:25pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/6 "2021-12-23T15:25:06Z")
It has to do with simplified/faster math we use in WLED. ---
**Author:** ![sbeerda](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/sbeerda/32/2489_2.png) [@sbeerda](https://wled.discourse.group/u/sbeerda)\ **Post date:** [December 25, 2021, 4:23pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/7 "2021-12-25T16:23:41Z")
so it did it again with long set to -120, changed to -121 and works again ---
**Author:** ![divsys](https://avatars.discourse-cdn.com/v4/letter/d/a3d4f5/32.png) [@divsys](https://wled.discourse.group/u/divsys)\ **Post date:** [December 25, 2021, 4:54pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/8 "2021-12-25T16:54:50Z")
> [@blazoncek](#): > > It has to do with simplified/faster math we use in WLED Reading between the lines on @blazoncek, I’m hearing that the “fast math” algorithm they’ve chosen, doesn’t handle certain cases properly and you’re likely to find “magic” numbers that just don’t work. Changing just up or down from those (by even 0.1) will probably work OK as you found. Maybe stuck with some of those till a bugfix arrives… ---
**Author:** ![blazoncek](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/blazoncek/32/1886_2.png) [@blazoncek](https://wled.discourse.group/u/blazoncek)\ **Post date:** [December 25, 2021, 6:16pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/9 "2021-12-25T18:16:52Z")
If you can compile yourself add this `build_flags` option `-D WLED_USE_REAL_MATH`. WLED will use standard libc math (accurate but more memory hungry). ---
**Author:** ![divsys](https://avatars.discourse-cdn.com/v4/letter/d/a3d4f5/32.png) [@divsys](https://wled.discourse.group/u/divsys)\ **Post date:** [December 25, 2021, 7:12pm UTC](https://wled.discourse.group/t/time-setup-sunset-incorrect/4459/10 "2021-12-25T19:12:31Z")
Personally, I’ll live with the magic numbers. I’m much more segment memory hungry than SunsetTime hungry. Thanks for all your efforts - Merry Christmas! 🎄