Depending on the gauge string, it might be possible to tune a b string to e but probably not advisable.
For one thing, the difference in string tension between the first and second strings would be so dramatic as to potentially affect your playing.
The other issue is the potential to put too much tension on the neck trying to get a thicker string to tune to e. And of course the string may very well break.
One thing you might be able to get away with is tuning the entire guitar down a full step which would increase the likelihood of getting the b string tuned to d instead of e - but it still might break and will be very tight compared to the 2nd string.
If you have a capo or can make one out of rubber bands and a pencil, you could even tune the guitar 2 steps flat and put a capo on the 4th fret. Not ideal but might get you through the weekend.
If you try to tune the b string to e - wear eye protection as you tighten the string so when it snaps, it won't hit you in the eye if it recoils.
If it were me, I would go with the slack tuning for the entire guitar or work on songs that used power chords on the wound strings and did not involve the e string at all.
Good luck and be careful.