"This wasn’t Flamsteed getting his prediction wrong, but represents the date of the eclipse by the Old Style calendar (used before the 1752 adoption of the Greg

"This wasn’t Flamsteed getting his prediction wrong, but represents the date of the eclipse by the Old Style calendar (used before the 1752 adoption of the Gregorian calendar)" Is it common to make the correction from Julian to Gregorian? I would have thought it more accurate the stick with the local date of the event - ie, April 22, especially since that appears in both the Flamsteed potrait and Halley's map. Am I mistaken? Or did the Guardian just discover it had missed the actual anniversary, and use the calendar difference to add a touch more timeliness to its coverage?