Using CURDATE, DATE_SUB and DATE_ADD

I am using the query below in attempting to control access to a web site. The idea is that today's date must be between 1 month before the start date and 1 month after the finish date. $query1 = "SELECT VFT_name FROM vft WHERE CURDATE() > DATE_SUB(VFT_date_start, INTERVAL 1 month) AND CURDATE() < DATE_ADD(VFT_date_finish, INTERVAL 1 month) "; It seems that if a start date is say March 31, then any date in February (even Feb 01) is going to return true. I tried using days (28, 29, .. 35 etc) instead of 1 month in the query but that doesn't seem to work. For a start-date of March 11 how can I deny access on Feb 10 but allow access starting on Feb 11? Thanks for any help. Barrie ------------------------------------------------------- Barrie Matthews, Webmaster Heurisko Ltd, Learning Technology Specialists Spark House, 5 Durham St, PO Box 8577, Christchurch, New Zealand P +64 3 353-7360 F +64 3 366-5488 b.matthews@heurisko.co.nz www.heurisko.co.nz Heurisko services: - LEARNZ, NZ's award winning online education programme www.learnz.org.nz/ - TheSchoolDaily - daily education news and features www.theschooldaily.com/ - NZ agent for TextHELP! products - award winning learning disability software www.texthelp.co.nz/ - Suppliers of digital cameras, scanners, printers and POLYCOMS www.heurisko.co.nz/teachingtools/ - Web server hosting and internet/intranet solutions www.heurisko.co.nz/webservices/ -------------------------------------------------------