# 2. (optional) Name of form field - default: "date"
# 3. (optional) Month to display in format: YYYY-MM - default: current month
# 4. (optional, multiple) Days to preselect in format: DD - default: none
# 2. (optional) Name of form field - default: "date"
# 3. (optional) Month to display in format: YYYY-MM - default: current month
# 4. (optional, multiple) Days to preselect in format: DD - default: none