The Air Datepicker code from this github library https://github.com/t1m0n/air-datepicker has been implemented as components for reuse in Outsystems.  This allows additional calendar components not available by default from the platform. 

This code is implemented by the following steps:

1. Add the AirDatePicker library to the screen
2. Add any locales to the screen for the desired language.  Multiple languages are already provided by the tool. (Default is Russian)
3. Change the default calendar picker web block to the yearmonthselector web block
4. Add any customizations by passing in the values to the yearmonthselector. (i.e. format, initial dates)

Documentation: http://t1m0n.name/air-datepicker/docs/