Jaga, the only real importance of use year is if you have to cancel a reservation. When you cancel, points go back into your account, but if it were near the end of your use year, the points may go back at a time where they can no longer be banked and you would have to use them or lose them.
As an example suppose you compare an April use year to a September use year. You make a reservation for August, and wind up cancelling it in June. For an April use year, you still have 10 months left, and can therefore bank all the points from the cancelled reservation. However, if it was a September use year, you would only have 3-months left and would be at the 25% banking window. You might not be able to bank all the points recovered from your cancelled reservation.
Now, there's other affects on use year. In the above example, your April use year would be for 2001 year points for your August reservation. However, your September use year would be using year 2000 points for your August reservation. You would receive your 2001 points on Sept 1, 2001. This is what will make the difference in your purchase choices between April, August and December use years. To 'see' it more clearly, use the following chart which shows an April use year. Make a similar chart for August, and a third chart for December. Then, knowing that you can bank from any one use year into the following year, or you can borrow from any use year into the prior year, you can compare the points banked, borrowed, or remaining in each of your potential purchases, and see which is the best value.
If you need more help, feel free to post back with the actual numbers, prices asked, points in the contracts, how many points available, or banked, or borrowed, and from which years, for each contract. Then either myself, or many others, could help you decide on the best 'deal'.
<Table border><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Use</B></FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Start</B></FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>End</B></FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Annual</B></FONT></TD><TD BGCOLOR=#FFFF99 COLSPAN=3><FONT FACE="Arial"><B>Banking Deadlines</B></FONT></TD></TR><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Year</B></FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Date</B></FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Date</B></FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial"><B>Points</B></FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:0%"><FONT FACE="Arial"><B>100%</B></FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:0%"><FONT FACE="Arial"><B>50%</B></FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:0%"><FONT FACE="Arial"><B>25%</B></FONT></TD></TR><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial">2000</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">4/1/00</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">3/31/01</FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial">220</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">9/30/00</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">12/31/00</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">1/31/01</FONT></TD></TR><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial">2001</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">4/1/01</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">3/31/02</FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial">220</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">9/30/01</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">12/31/01</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">1/31/02</FONT></TD></TR><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial">2002</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">4/1/02</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">3/31/03</FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial">220</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">9/30/02</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">12/31/02</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">1/31/03</FONT></TD></TR><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial">2003</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">4/1/03</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">3/31/04</FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial">220</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">9/30/03</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">12/31/03</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">1/31/04</FONT></TD></TR><TR ALIGN="center" VALIGN="bottom"><TD BGCOLOR=#FFFF99><FONT FACE="Arial">2004</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">4/1/04</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">3/31/05</FONT></TD><TD BGCOLOR=#FFFF99><FONT FACE="Arial">220</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">9/30/04</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">12/31/04</FONT></TD><TD BGCOLOR=#FFFF99 STYLE="vnd.ms-excel.numberformat:m/d/yy"><FONT FACE="Arial">1/31/05</FONT></TD></TR></Table>