All about Abigail's Birthday. Have a Happy Birthday all day from daybreak to the moonlight. Abigail's birthday should be known to everyone. Have a nice birthday and get a lot of presents. Happy Birthday Abigail from AwesomeBirthdaySong.com! Till next year, Happy Birthday Abigail!br br Don't forget to check out AwesomeBirthdaySong.com for a name near you! No matter the name, everyone deserves a funny Happy Birthday song to brighten up their day.