[christie]

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Kerry voted in the Senate on March 6.

Kerry voted both February 28 and March 6, 1971. No votes taken on March 3.

http://www.senate.gov/legislative/LIS/roll_call_lists/vote_menu_102_1.htm

Besides, it's not on my John F. Kerry Timeline.
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[UnbelievingScumOnTheOtherSide]

The Senate was in session on Feb. 28 and Mar. 5, 1991 with only a pro forma session between lasting one minute on the 1st. There were no roll call votes on the 5th.
http://thomas.loc.gov/r102/r102.html

[Oblongata]

"Kerry voted both February 28 and March 6, 1971. No votes taken on March 3."

March 3, 1991 was a Sunday.