[Durgan]

Here’s what you need to do to ripen your pears:

• Leave firm, unripe pears at room temperature so that they can ripen.
• Check the Neck for Ripeness daily, by applying gentle pressure to the neck, or stem end, of the pear with your thumb. If it yields to pressure, then it’s ripe and ready to eat!
• Once the pear is ripe, it can be refrigerated to slow the ripening process and saved for use up to five days later.

http://usapears.org/pear-ripening-and-handling/