An appropriate file-naming scheme might be as follows;
1306CROP
0308BANK
1st & 2nd Year Updated 13 for 2013
3rd & 4th Month Updated 06 for June
Remainder Who the budget was prepared for, or what the sheet related to.
Tip: Keep the filename short and concise, do not use any punctuation or spaces.
This scheme presents the files in chronological order. If further information about assumptions made, or enterprises included in the budget needs to be recorded, use the Title, Description and Remarks fields presented during Save to record this. This further information is also available under the properties button.