Some birthday wishes include “Warmest wishes for a happy birthday," and “I hope you get to do something fun to celebrate.” Lists of birthday wishes are available on Hallmark.com and 1HappyBirthday.com, as of March 2015.
From the Hallmark home page, place the cursor over Shop. From the drop-down menu that appears, click on Birthday under the Occasion heading. Scroll to the bottom of the page, and follow the What to Write in a Birthday Card under the Birthday heading. Birthday wishes for a variety of situations are available, including milestone birthdays, difficult circumstances and group cards. There are also greetings categorized by the sender's relationship to the receiver of the card, such as friend, parent, spouse or professional colleague.
From the 1HappyBirthday.com home page, click on Birthday Wishes & Messages. The page has hundreds of greetings listed, and each greeting has an email link next to it. Some cards have long printed messages, which work well with short written messages. If a card is late, a sincere or humorous apology may help. Humor works well for birthday wishes, even during difficult circumstances. A closing, such as "Warmly," "With Love," or, "Happy Birthday," should be included in the valediction of the message.