The week that Jesus was crucified was the week of the Jewish Passover
which is one of the High Holy Days. I believe there is a day of
Preparation preceeding the actual Passover day. What day of that week
was the Passover Day?

Which Day Was Christ Crucified? -
... The NIV suggests a somewhat less difficult handling of the
apparent discrepancy: "It was the day of Preparation of Passover Week,
about the sixth hour. ...
answering-islam.org.uk/Cross/crucifixion-day.html

The above site is the first one that come up on searching:  passover week day

There are only 417,000 more sites, so you can have some fun,
but maybe a researcher would like to do the job for you.

Tuesday

Monday.

Wednesday 
http://ad2004.com/prophecytruths/Articles/Prophecy/3days3nights.html

Hi!

I answered a somewhat similar question two years ago.

\http://answers.google.com/answers/threadview?id=192915

So now we've got Monday, Tuesday, Wednesday & Friday as prime suspects.

Any other suggestions?

(Clue: There are THREE other possible days to choose from.)

The days are quite hard to make out.  I did however hear a very
compelling arguement from a speaker telling how Jesus was likely
crusified on Thursday as opposed to the very popular belief of Friday.
I had often wondered about the 3 days between his death and
ressurection since Friday night to Sunday morning just didn't quite
cut it in my mind.  And this arguement brought not only obvious things
like that into play, but also ceremonies and traditions that are
touched on in the bible that suggest Thursday was the more likely day.