Moms keep changing with the times. And greeting card companies keep changing their Mother's Day cards along with them.

This year marks the 100th anniversary of President Woodrow Wilson's declaration of Mother's Day as a national holiday. So how has motherhood changed over the decades?

To answer that question, amNewYork took a look at greeting cards from the major companies that create them. While the cards may not reflect exactly how mothers have felt about themselves, they capture the way they have been represented over the years.