If you have a specific destination in mind, it's worth booking early, sometimes
even several months in advance.
Not exact matches
Allowing at least a year is ideal, but
even beginning
several months in advance is good.
It's also important to sock away money for your down payment
in that same savings account
several months, or
even years,
in advance.
Settling on a retirement date
several months — or
even a couple of years —
in advance will give you the time you need to properly close and store certain files, and to identify trusted colleagues to whom you can refer the rest.