1. コミュニティ
2. Product Feedback
3. [Status: Not planned] Editable Task Completion Date

I agree. This is pretty necessary. I always forget the mark the task as completed, and end up doing it long after the actual completion date - which makes the completed date useless for reports. 

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great! thanks. next syntax highlighting please

1. コミュニティ
2. Product Feedback
3. [Status: Not planned] Markdown formatting in Description field

guys.... this issue has been around for over a year. This is a critical feature and it would literally take me less than a day to implement.