Hi @anon40218812, welcome to the Asana Community Forum! You can create a report using our Advanced Search feature and filter by completed task assigned to you and marked complete on a specific date.
In regards to your request to show tasks in calendar view based on when they were completed. We already have a thread on this topic, I recommend you voting for this feature here: Feature Request: Calendar View - Tasks by Date Completed
I hope this helps! Let me know if you have any other questions 