This module relies on:

* The OCA module '2D matrix for x2many fields', and can be downloaded from
  Github: https://github.com/OCA/web/tree/15.0/web_widget_x2many_2d_matrix
* The OCA module 'Date Range', and can be downloaded from
  Github: https://github.com/OCA/server-ux/tree/15.0/date_range