Christening listed as Feb 1621, use 1621 or 1622 on wikitree?

Question

The start of the calendar year changed from March 25 to January 1 in 1752. Should entries on wikitree change the year to reflect what we now use, January 1 for dates given prior to 1752 that fall between Jan 1 and Mar 25? (I'm looking at the birth of Johan on this page)

Answer 1

For information on the two calendars, WikiTree has a help page here. I generally put both years in the biography, e.g., 1 February 1721/22. Then I use 1722 in the date field at the top.

Answer 2

That depends on location. Only in England and British territories do you need to make the calendar adjustment. They did not adapt the Gregorian calendar until 1752. Continental Europe, including the various German states had adapted the Gregorian calendar in 1589.