22/04/16 What does ‘ANNIVERSARY’ mean in legal English?

e-legal lesson

Anniversary means a day that marks the occurrence of an event on that date in a previous year, but it’s also used informally to mark a milestone in months or even weeks. The latter use of anniversary is routine in contracts, and eliminating it results in prose that’s not only more logical but also more concise.

Here’s an example:
The Company shall redeem this debenture in 24 equal installments of principal and accrued interest monthly beginning on the one-month anniversary following

[read one month after] the First Closing Date.

Silly but nonetheless commonplace is 12-month anniversary, as in ending on the 12-month anniversary of the Termination Date. Because 12 months make a year, the phrase 12-month is superfluous.