Save the dates for vow renewals can be an absolute necessity for those planning a celebration around a major holiday or during popular vacation times.  You should send out your save-the-dates 6-8 months before the celebration to give your guests plenty of time to make plans to attend in these situations. For destination vow renewals, send them out 8-10 months ahead of the celebration.

Here is a save the date wording example to help you get yours started.

Together they have
found a friendship, raised a family
and built a beautiful marriage.
Please join

Karie & Michael
Barrett

as they reaffirm their wedding vows
on Saturday, June 23rd, 2012
at 2:00p.m.
1234 Awesome Street, Your City, NE
Luncheon reception immediately following the ceremony
RSVP by June 1st, 2012

Save the date cards for a vow renewal can go out by either traditional postal mail or email. The more likely your intended guests will be making other plans on your date, the sooner you should send out your save the date cards!