Hi!
I'm not 100% sure, but I THINK you only have to update the line of code for the clickable arrow that changes the month. Right now you have:
<a onclick="jQuery.datepick._adjustDate('#calendar_booking13', +1, 'M');" href="javascript:void(0)">»</a>
for the first calendar
<a onclick="jQuery.datepick._adjustDate('#calendar_booking15', +1, 'M');" href="javascript:void(0)">»</a>
for the second and
<a onclick="jQuery.datepick._adjustDate('#calendar_booking16', +1, 'M');" href="javascript:void(0)">»</a>
for the third. If you change all of them to:
<a onclick="jQuery.datepick._adjustDate('#calendar_booking13', +1, 'M'); jQuery.datepick._adjustDate('#calendar_booking15', +1, 'M'); jQuery.datepick._adjustDate('#calendar_booking16', +1, 'M');" href="javascript:void(0)">»</a>
... then this will make all calendars go forward one month when you click that arrow. And you must ofcourse do likewise for the go back arrow.
Contact me!
Best regards,
Haakon Sundaune