EPW files for locations with Winter Time

asked 2022-04-05 16:44:14 -0500

Nathaniel Jones

531 ●4 https://nljones.github.io/

updated 2022-04-05 17:05:08 -0500

Aaron Boranian

14070 ●81 ●24 http://bigladdersoftware.com/

There are a few locations where, rather than setting clocks forward for Daylight Saving Time in the summer, the clocks are set back for Winter Time in the winter. What is the convention for the EPW file time zone flag in these cases?

I recently used an EPW file for Dublin, Ireland, and found that it lists the GMT offset as 0, when the standard (summer) time in Ireland is actually GMT+1. This breaks compatibility with time zone aware system libraries (e.g. Python's tzinfo). Is there any advice on how to correct for this?

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In that case, there seems to be a bug in the Dublin EPW file. Ireland has "standard time" when most European countries are in DST, and "winter time" when others are in standard time, so the offset listed in the EPW first line is not its standard time.

Nathaniel Jones ( 2022-04-05 19:46:37 -0500 )edit

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EPW files for locations with Winter Time

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EPW files for locations with Winter Time