[SOLVED] Place default end date calendar at start date month

Hi,

If I want to input a start date in 6 months (January 2016 for example), I have to select start date in January 2016.
Then when I want to select an end date, I have to go through all months again so it would be good to have end date calendar popup directly at January 2016 and not at current month (August 2015). In other words, end date <= start date should not be selectable in the calendar

A lot of project management software have this feature, I don't know if this already have been suggested…

Thank you,