CREATE TABLE table_77496 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner-up" TEXT)

A tournament on which date has a margin of victory of 2 strokes and a par of 16?
SELECT "Date" FROM table_77496 WHERE "Margin of victory" = '2 strokes' AND "To par" = '−16'
SELECT "Date" FROM "table_77496" WHERE "Margin of victory" = '2 strokes' AND "To par" = '−16'