marking languages still vigorous today

http://www.unesco.org/new/en/unesco/events/prizes-and-celebrations/celebrations/international-days/international-mother-language-day-2016/

This year's day for Mother Languages.

On the other side of the human patrimony ledger is the erosion of spoken languages and environments/livelihoods they derive from; see these notes taken from K. David Harrison's book, When Languages Die, to get a taste of this subject.

https://sites.google.com/site/big1file/nb-languagesdie

reckoning time - swap from Julian to Gregorian calendar

excerpt from full article, http://www.atlasobscura.com/articles/why-england-was-a-year-behind-belgium-spain-and-italy-for-170-years

...the longer a country waited to shift to the Gregorian calendar, the more days needed to be removed; in 1752, England and its colonies went to sleep on September 2 and rose on September 13, as per the Calendar Act of 1750. Russia didn't change calendars until February 14, 1918 and skipped a whole 13 days, meaning their October Revolution of 1917 actually happened, by today's dating system, in November.