[events-calendar] Fixes off-by-one error

pe.date.convert(Array) expects months in zero-base format.
Merge pull request #1864 from berubs/issue1862

[events-calendar] Fixes off-by-one error
Multimedia: added data-role='none' to stop jQuery Mobile from enhancing controls
Merge pull request #1871 from patheard/tabbed-multimedia

Multimedia: added data-role='none' to stop jQuery Mobile from enhancing controls
Resolved merge conflicts.