I spent my Christmas holiday writing yellow letters.  Would it be wise to mail them out today so that they will arrive a few days before New Year's, when people may still be off from work and have more time to go through their mail?

Or would it be better to wait until after New Year's since people may still be out-of-town the week before New Year's?  And after New Year's, after the holiday glow has dimmed, people will be back in the "swing of things" of everyday life and perhaps more prone to considering a business decision like selling their property.

Also, would it be cheesy to use Christmas or New Year's stamps?

I know the timing here (and the type of stamp) won't necessarily make or break but am just curious if anyone has any experience with sending out yellow letters this time of the year.