December 9th, 2021
Web site: | http://www.hallmark.com/christmas/christmas-cards/ |
Christmas Card Day is a reminder to get stamps, envelopes, and cards together and mail out some holiday cheer. Getting cards out on this date or shortly thereafter helps ensure they will arrive in time for Christmas, as the postal service gets very busy this time of year. If paper cards are not desired, there's always the option to send electronic greetings.
Source: en.wikipedia.org/wiki/Christmas_card