district: Calendar via mixin, program page to menu, program from redmine via fetch

district/blocks.py

district/migrations/0005_auto_20211108_2126.py

district/migrations/0006_auto_20211111_1130.py

district/models.py

district/templates/district/base.html

district/templates/district/blocks/program_block.html

district/templates/district/district_contact_page.html

district/templates/district/district_program_page.html

region/blocks.py

region/migrations/0002_regionhomepage_subheader.py

region/models.py

region/templates/region/base.html

region/templates/region/blocks/homepage_header_block.html

region/templates/region/region_contact_page.html

shared/templates/shared/calendar_current_events_snippet.html