Flask-Admin: To update timestamp with timezone field with UTC

app.py

import pytz

   class MyView(MyModelView):
      # Display the time in user's local timezone on the List View
      column_formatters = 
          dict(scheduledtime=lambda v,c,m,p: m.scheduledtime.replace(tzinfo=pytz.utc).astimezone(tz=pytz.timezone(config.LOCAL_TIMEZONE)))
          
      # Display the time in user's timezone on the Edit View
      def edit_form(self, obj):
          form = self._edit_form_class(get_form_data(), obj=obj)
          form.scheduledtime.data = form.scheduledtime.data.replace(tzinfo=pytz.utc).astimezone(tz=pytz.timezone(config.LOCAL_TIMEZONE))
          return form

      def on_model_change(self, form, model, is_created):
      
          stime = request.form['scheduledtime']
          
          # Convert the timestamp from user's local timezone to UTC before saving(..from Create/Edit Form)
          local = pytz.timezone(config.LOCAL_TIMEZONE)
          local_dt_nodst = local.localize(datetime.strptime(str(stime), "%Y-%m-%d %H:%M:%S"), is_dst=None)
          isdst_now_in = lambda zonename: bool(local_dt_nodst.dst())
          local_dt_dst = local.localize(datetime.strptime(str(stime), "%Y-%m-%d %H:%M:%S"), is_dst=isdst_now_in)
          utc_dt = local_dt_dst.astimezone(pytz.utc)
          
          model.scheduledtime = utc_dt.strftime("%Y-%m-%d %H:%M:%S")