Calendar class, is there a way to show previous month dates in current calendar

Hi,
I am trying to figure out if its possible to show up some of previous months dates in current calendar.
example


This calendar shows greyed out dates from previous months.

What am I doing.
We have a requirement to show up date ranges of pay cycles. Now the pay cycles does cross a month.
In DB we have start_date and Period
The period saves values like "weekly, monthly, biweekly", so we calculate and get the end_date for the same.
I was able to generate all dates from Start to ends and feed it to the calendar library.

This all works fine for current month, but not for next month since we have new dates for next month.

thank you

Harpreet Bhatia
Web Developer / Analyst
Technical Reviewer - "Codeigniter 2 Cookbook"

i guess you should ask here https://forum.jquery.com/