I hid them from the birds under transparent type 1 (pete) plastic bottle tops. They started falling off the tree at the beginning of September the last one being on the 16th. They don't keep; the first one having gone slightly yellow I decided to eat only to find the inside going over soft. Although sweet and tasty the skin was a bit rough and many times I spat bits out.
No pears in 2016 or 2017. Although there were hundreds of flowers in 2018 there were only two pears, which fell on 8th or 9th September
Eaten the second pear on 13th so 4 or 5 days after fall