Chrome date picker extension
This extension adds a calendar to any web page.
Activate the date picker by double-clicking in a text field, then click on a date to select it into the text field.
Alternatively click on the date picker icon in the extensions panel then click on a date to copy it to the clipboard.
If it doesn't work for you please let me know so I can improve it. You can find me on twitter as @KiwiCoder.