All I can see online is that March 28th is "Serfs Emancipation Day" in China, the 51st anniversary of the Chinese government's dissolution of the Central Tibetan Administration, the government headed by the Dalai Lama which had ruled Tibet for nearly 400 years. Therefore this is also the 51st anniversary of the Central Tibetan Administration's government in exile.
EDIT: Hmm, my posting history says I posted #2790 on 3/27 and post 2791 on 3/30. I guess I missed it last year.
The honour falls to tarnish this time! Recent millions (and how long it took to get there): 44M 24 Nov 2007 13:42:20 (63:08:17:51) 43M 22 Sep 2007 06:24:29 (60:18:18:39) 42M 23 Jul 2007 12:05:50 (48:18:49:31) 41M 04 Jun 2007 17:16:19 (55:03:11:26)