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In 1582, Pope Gregory XIII introduced a major calendar reform to correct the drift of the Julian calendar. What adjustment did he make to realign the calendar with the solar year?

the correct answer is that he removed ten days from October.<br><br> By the late 16th century, the Julian calendar had drifted about ten days out of sync with the solar year, causing Easter and other feasts to fall at the wrong times. To fix this, Pope Gregory XIII ordered that Thursday, October 4, 1582, be followed immediately by Friday, October 15, 1582, effectively deleting ten days. This adjustment, along with new leap‑year rules, created the Gregorian calendar still used today. The VPSrobot always finds this moment amusing — humanity collectively “lost” ten days, yet somehow managed to keep all its appointments.