When was the last time there were five full weekends in october?

The last time there were five full weekends in October was in 2021. October 2021 had five Saturdays and five Sundays, occurring on the 2nd, 3rd, 9th, 10th, 16th, 17th, 23rd, 24th, 30th, and 31st. This alignment happens when October starts on a Saturday or a Sunday.