Matrix user forums

Posted: **Thu Oct 08, 2015 8:42 pm**

I needed for my project (4 channel timer) automatic summer time and standard time changeover. Even if I use the Internet time (NTP) to synchronize the RTC, I must GMT 01 or GMT 02 send them along. That's why I've written a routine that calculated by the RTC data the switching data.
This is based on an article in Wikipedia for the determination of the day of the week:

https://de.wikipedia.org/wiki/Wochentagsberechnung

From this, the routines "DayOfWeek.fcfx" and "Daylightsaving with DayOfWeek.fcfx" emerged.

DayOfWeek.fcfx: (6.88 KiB) Downloaded 681 times

DayLightSaving with DayOfWeek.fcfx: (10.48 KiB) Downloaded 681 times

Posted: **Thu Oct 08, 2015 9:33 pm**

Hi Tiny,
Thank you for sharing your flowcharts with us.
You have done a great job in converting formula that Flowcode can use.
I'm also interested in calculating the day of the week and when clocks change so wrote a Blog on it if you want to see how I have done it?

Matrix user forums

Day of Week and DaylightSaving

Day of Week and DaylightSaving

Re: Day of Week and DaylightSaving