old_contents: from django.contrib import admin
  
  from .models import ReportedCase, EHP, SMS
  
  
  class ReportedCaseAdmin(admin.ModelAdmin):
      date_hierarchy = 'created_at'
      list_display = ('first_name',
                      'last_name',
                      'locality',
                      'sa_id_number',
                      'msisdn',
                      'id_type',
                      'gender',
                      'facility_code',
                      'landmark',
                      'created_at')
      list_filter = ('facility_code', 'gender', 'created_at')
  
  
  class SMSAdmin(admin.ModelAdmin):
      date_hierarchy = 'created_at'
      list_display = ('to', 'content', 'created_at')
      list_filter = ('created_at',)
  
  
  admin.site.register(ReportedCase, ReportedCaseAdmin)
  admin.site.register(EHP)
  admin.site.register(SMS, SMSAdmin)
  
new_contents: from django.contrib import admin
  
  from .models import ReportedCase, EHP, SMS
  
  
  class ReportedCaseAdmin(admin.ModelAdmin):
      date_hierarchy = 'created_at'
      list_display = ('first_name',
                      'last_name',
                      'locality',
                      'sa_id_number',
                      'msisdn',
                      'id_type',
                      'gender',
                      'facility_code',
                      'landmark',
                      'create_date_time')
      list_filter = ('facility_code', 'gender', 'create_date_time')
  
  
  class SMSAdmin(admin.ModelAdmin):
      date_hierarchy = 'created_at'
      list_display = ('to', 'content', 'created_at')
      list_filter = ('created_at',)
  
  
  admin.site.register(ReportedCase, ReportedCaseAdmin)
  admin.site.register(EHP)
  admin.site.register(SMS, SMSAdmin)
  
subject: use Onas timestamp for filtering