This is the job description https://www.phantomconnections.space/phpBB3/viewtopic.php?f=3&t=751632&p=861344 porncor a puzzle, even to experienced gardeners. It will depend partly on the cultivar and partly on the weather, but should always be completed before the first frosts and when the fruit is dry. It is unlikely that all fruit on a tree will ripen evenly, so you may need to pick in stages. Typically, this year, due to the cold spring and early summer, picking dates are probably a week or two later than usual.