Yom Kippur

בראש השנה יכתבון, וביום צום כיפור יחתמון
"On Rosh Hashanah it is written, and on Yom Kippur it is sealed."
-The Unetanah Tokef

Definitely glad I was here instead of at work, even if they did schedule a meeting on Yom Kippur:

( The Day of Atonement )