Well.. can we?
I suggest either:
xxYYY
or
YYYxx
where xx = day
and YYY = month
Every time I try to do an itinerary search it's mostly sorting through garbage.
e.g. today I wanted to see who was flying on the 20th, so I searched for "20" which gives you 2004, every flight number with "20" in it, etc.
If we all agreed upon a universal format, it would be really easy to find who who's flying when and where. "20AUG" or "AUG20" would be very quick and easy.