Last day to mail a Grandparents Day card
National Grandparents Day is the first Sunday after Labor Day, so it moves every year. Here's the last day to mail so the card arrives while it still means something.
Mail by — 2026
Monday, September 7, 2026
So it arrives safely before Grandparents Day on Sunday, September 13, 2026. Cutting it close? Wednesday, September 9, 2026is the latest we'd risk. That's 63 days from today.
Planning ahead? For 2027, mail by Monday, September 6, 2027 (Grandparents Day is Sunday, September 12, 2027).
How we got that date
First-class mail typically takes 3–5 business days, and weekends don't count. We work back 5 business days from Grandparents Day so the card lands a day or two early — early reads as thoughtful, late reads as forgotten. Around the holidays, mail volume runs heavy, so the buffer matters more than usual.
Timing and message tips
It falls on a Sunday — count back to the Friday before for the real mailing deadline.
Grandparents are the demographic most likely to display a card on the mantel. Physical beats digital here by a mile.
Have grandkids? A card in a child's own handwriting (or a drawing) is the keepsake version.
One specific memory of time spent together lands harder than "thinking of you."
Don't rely on remembering the deadline
Set a free reminder and we'll nudge you before the mailing window closes — with time to spare. Want to skip the post office entirely? we'll print, hand-write, stamp and mail it for you so it arrives on time. From $7.99, postage included.