Spreading your Fast day over 2 days

[PointlessOP]

I thought I read somewhere that you can spread your fasting day over 2 days. Does anyone have any experience of this?

This week I did the following

Wednesday - ate normal breakfast & lunch then started fast (last ate at 1pm)
Thursday - ate breakfast & lunch totalling 500 calories and then had a normal dinner

By my calculations, my fasting period was only 29 hours and not the 36 hours mentioned on most of the websites.

Is this OK? Or should I stick to fasting on a single day?

Thanks for your help.

so which 24 hours had the 500 calories?
most of us aim for 36 on 500
and define 'normal' : because you need to make 'normal' be your TDEE or less