I try to do this every day, but often fail. However, I do keep a factual journal inherited from when I was in a business partnership and needed to record what I did with my time. At the end of each month I refer to this so I can go back and fill in the gaps. Some of my blog entries help too.
It gets done each month because I always post my monthly haiku diary in my Writelink blog. The link is to the last one posted for November.
As I look back, I can often recognise the ones I wrote as they happened because they are more poetic and less about the factual things. But even if the words in my haiku are less tangible, I can still relate them to what I did on the day.
December is a very busy month so I have lots of gaps to fill. But below is one I wrote for Boxing Day on the 26th. My last post here was a prose version of that day too, one which I wrote in the evening.Summer’s leaf curtains
are drawn back to air the views
on our country drive.
Pic is by Raould at Wikimedia Commons

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