<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">On 31 Mar 2019, at 21:09, Tim April <<a href="mailto:timapril@gmail.com" class="">timapril@gmail.com</a>> wrote:<br class=""><div><div class=""><br class="Apple-interchange-newline"></div><blockquote type="cite" class=""><div dir="ltr" class=""><div dir="ltr" class="">On Sun, Mar 31, 2019 at 5:56 PM Matthew Pounsett <<a href="mailto:matt@conundrum.com" class="">matt@conundrum.com</a>> wrote:</div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr" class=""><div class="gmail_quote"><div class="">I'm not convinced that we need to pay any attention to holidays, or even weekends. Although I'm willing to be. </div><div class=""><br class=""></div><div class="">If 5011 is well deployed, and we're testing it every year or two though root KSK rolls, why are we concerned about the day of the week that a change gets applied? The Internet is 24x7, after all. What is the middle of the night on a holiday, for you, is business hours on a workday for someone else. I can't imagine that we could avoid holidays in a balanced way. </div><div class=""></div></div></div></blockquote><div class=""><br class=""></div><div class="">Very true. The only reason I had included that was some complaints on some operator lists about making operational changes on weekends or Fridays (i assume the complaints would carry over to major holidays as well). My guess, with no data to support it, is that after another roll or two the desire for the complicated scheduling would relax.</div></div></div></blockquote><div><br class=""></div></div>The work week is variously Sunday-Thursday, Monday-Friday, Saturday-Thursday, Saturday-Wednesday depending on where you are in the world, which means Friday, Saturday and Sunday are out (weekends) as are Monday and Thursday (day before a weekend or day after a weekend). That leaves the single day Tuesday, which because of time zones will inevitably leak into Monday or Wednesday for parts of the world regardless of what time zone it is envisoned to be in (the time period over which it is Tuesday somewhere is greater than 48 hours).<div class=""><br class=""></div><div class="">The union of Bahá'í, Buddhist, Celtic/Norse/Neopagan, Christian, East Asian, Hindu, Islamic, Jain, Jewish, Sikh and secular holidays (taxonomy lifted without great accuracy from the exhausting Wikipedia article "Lists of holidays") already covers an impressive number of days, and then you remember that there are holidays celebrated on dates in calendars with a different periodicity to the Gregorian calendar and realise that to a good approximation any nominated day of the year will always be a holiday somewhere, some year.</div><div class=""><br class=""></div><div class="">Any inclusive policy of avoiding holidays is not going to work, and any explicitly exclusive policy has the potential to cause offence.</div><div class=""><br class=""></div><div class="">It seems a lot better not to talk about finding dates that don't collide with holidays and to use some other convenient criteria instead.</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Joe</div></body></html>