Soyle bir yontem var, 3 temmuz 2014'u temmuz haline getiriyor:
Turkce ornegi(ture aaa yazdim):
i.hizliresim.com 
Eger yillar farkliysa aaa yerine aaayy yazarsan Tem15 oluyor.
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You can change the cell formating to another custom format.
Under the Format Cells -> Number tab is the "Category:" list. The last
option is Custom. Selecting this shows a "Type:" list of available custom
types.
This list can be added to, by overwriting what is in the "Type:" box.
Add mmm for Jan, Feb etc or mmmm for full month names
I often use ddd dd mmm yyyy for "Sun 21 Feb 2010"
The sample box updates as you type, so for example using that date:
m = 2
mm = 02
mmm = Feb
mmmm = February
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sonrasinda gunler hep
tem
agu
oca
filan olur, vlookup ile diger sheetten kurlari alabilirsin. onun da ornegini gosteririm istersen.