Why is my mac replacing my name on all my email as "Holiday In The United States"?

Recently I noticed that on both Spark and the default mail app, my name is being replaced as "Holiday In The United States". This is happening on all my accounts, with various email providers. I have verified my name in both System Preferences, Spark Preferences, and Mail Preferences. Additionally, I have checked my name on each email provider's settings. To clarify, I am only seeing my name as "Holiday In The United States" from my Mac, not online. Any way I can fix this? It is really annoying having to log-in from the browser to send mail. I am currently on a MacBook Pro Mid 2014, running Mac OS Sierra 10.12.3.