entering duration in months

[ketanco]

Hello
I changed the duration entry type to months. from options field

The start date for all is january 1 for now.

for an activity that i enter 5 months, it shows a finish date of May 20



for an activity that I enter 8 months duration, it shows finish date as august 12. why is that and how can i change it to show to the end of may and august? because may 20 and august 12 is less than 5 or 8 months

to solve this problem i changed the calendar to 7 day calendar and then i changed the number of workdays in a month from 20 default value to 30 days. this corrcted the problem to a great deal however there is still little error, because of the months that have 31 days. how can i completely solve this probelm? the longer the task, the more number of 31 day months come into calculation and bigger the error