diff --git a/bip-0030.md b/bip-0030.md
index 77d6195f..c77810cf 100644
--- a/bip-0030.md
+++ b/bip-0030.md
@@ -17,7 +17,7 @@ So far, the Bitcoin reference implementation always assumed duplicate transactio
 To counter this problem, the following network rule is introduced:
 *Blocks are not allowed to contain a transaction whose hash matches that of an earlier transaction in the same chain, unless that earlier transaction was already fully spent before said block.
 
-This rule is to be applied to all blocks whose timestamp is after a point in time that is yet to be decided.
+This rule is to be applied to all blocks whose timestamp is after march 15, 2012, 0:00 UTC (unix timestamp 1331769600).
 
 ==Rationale==
 Whatever solution is used, the following law must be obeyed to guarantee sane behaviour: the set of usable