[x42.com] [datelab]Question: Which days are shortest or longest due to daylight savings time? ==========================================================================(C) 2015-10-26, Magnus Bodin <magnus@bodin.org> Not at all an eyebrowse raiser; the rule (for EUrope) to start the daylight savings time (summer time) the last weekend of March and end it in the last weekend of October, makes the last week of March one hour shorter and the last week of October one hour longer. Due to the calendar cycle, this makes the distribution of shortness and longness among these last dates of March and October a tiny bit irregular. The distribution is shown relative to the gregorian epoch (400 years) which is the cycle that our calendar revolves with. After 400 years everything repeats again. (See also yeartypes) Shortest days of the years, March +----+----------+-------+ | 25 | 58 times | 14.5% | | 26 | 56 times | 14.0% | | 27 | 58 times | 14.5% | | 28 | 56 times | 14.0% | | 29 | 58 times | 14.5% | | 30 | 57 times | 14.2% | | 31 | 57 times | 14.2% | +----+----------+-------+ Longest days of the years, October +----+----------+-------+ | 25 | 58 times | 14.5% | | 26 | 57 times | 14.2% | | 27 | 57 times | 14.2% | | 28 | 58 times | 14.5% | | 29 | 56 times | 14.0% | | 30 | 58 times | 14.5% | | 31 | 56 times | 14.0% | +----+----------+-------+ [x42.com] [datelab]