From:             
Operating system: windows
PHP version:      5.3.8
Package:          *Data Exchange functions
Bug Type:         Bug
Bug description:strtotime("-1 month");

Description:
------------
I often use strtotime, I won't change my program anywhere.
+1 month -1 month maybe as expected

Test script:
---------------
date("Y-m-d H:i:s", strtotime("-1 month", strtotime("2011-05-31
00:00:00")));
//2011-05-01 as expected
//2011-04-30 I Like

date("Y-m-d H:i:s", strtotime("+1 month", strtotime("2011-05-31
00:00:00")));
//2011-07-01 as expected
//2011-06-30 I Like


date("Y-m-d H:i:s", strtotime("-1 month", strtotime("2011-03-31
00:00:00")));
//2011-03-03 as expected
//2011-02-28 I Like


-- 
Edit bug report at https://bugs.php.net/bug.php?id=55792&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=55792&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=55792&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=55792&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=55792&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=55792&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=55792&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=55792&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=55792&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=55792&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=55792&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=55792&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=55792&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=55792&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=55792&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=55792&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=55792&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=55792&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=55792&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=55792&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=55792&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=55792&r=mysqlcfg

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