CREATE TABLE table_30521 ("Letters" TEXT, "Organization" TEXT, "Nickname" TEXT, "Founding Date" TEXT, "Founding University" TEXT, "Type" TEXT, "Canadian Chapters" TEXT)

When 1873-12-25 is the founding date how many organizations are there?
SELECT COUNT("Organization") FROM table_30521 WHERE "Founding Date" = '1873-12-25'
SELECT COUNT("Organization") FROM "table_30521" WHERE "Founding Date" = '1873-12-25'