This is an old revision of the document!
When adding an airport note, in a section 'Airport Directory', it is now possible to define its expiry date, which then will show in a Calendar panel of the OPS section.
In order to make this work, open 'Airport Directory', type an airport code and in a tab 'Notes & Files' add a note to the Note field and define its expiry date right below.
The inserted note will show in 'OPS > Calendar' panel, once a Show Day Note option is marked in 3-dot filter.