I wanted to assign the current date to a date field 'start\_date' in the following code:

```
calendar_obj.create(cr,uid,
             {'name' : rec_res.act_ion,
              'user_id' : rec_res.asgnd_to.id,
              'start_date' : lambda *a:datetime.today().strftime('%m-%d-%Y'),
              'stop_date' : rec_res.due_date,
              'allday' : True,
              'partner_ids' : [(6,0, [rec_res.asgnd_to.partner_id.id])]
             },
context=context)

```

How to set or assign the current date value to the *start\_date* field ?