On 2018-02-06 13:48:19 +0100, Vincent Lefevre wrote: > This is completely crazy: > > zira% date +%Y-%m-%d -d '2003-09-01 1 day ago + 1 month' > 2003-09-30 > zira% date +%Y-%m-%d -d '2003-09-01 1 day ago' > 2003-08-31 > zira% date +%Y-%m-%d -d '2003-08-31 + 1 month' > 2003-10-01 > > So, while '2003-09-01 1 day ago' gives 2003-08-31, the following > are not equivalent: > * '2003-09-01 1 day ago + 1 month' > * '2003-08-31 + 1 month' > > Where is the logic behind that?
Other ones: zira% date +%Y-%m-%d -d '2003-02-01 - 1 month' 2003-01-01 zira% date +%Y-%m-%d -d '2003-02-01 - 31 days' 2003-01-01 zira% date +%Y-%m-%d -d '2003-02-01 - 31 days + 1 month' 2003-01-29 zira% date +%Y-%m-%d -d '2003-02-01 - 1 month + 1 month' 2003-02-01 -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)