A date
11^11
It is: TODAY
Easter
A date
Today
piyusha
Today
A date or Today
Today (considering you'll read this answer today).
If you write April 26, 2011, this contains only 5 letters, but unfortunately also contains numbers...
One sentence using all the letters in "these letters" could be: "Settle these letters on the shelf for later use."
fights Using all letters: FIGHTS Using five letters: SHIFT GIFTS FIGHT SIGHT Using four letters: GIFT SIFT THIS Using three letters: FIG FIT HIT SIT TIS Using two letters: HI IF IS IT