What is your site niche? I have seen few sites on sports and wallpapers whose traffic goes up on weekends.
I don't think so there is a Google update on Sunday..etc. a fixed day...
If Google do this on Sunday, we all must have seen a loss or increase in the traffic on Sunday..


I can't see any changes on Monday.
There must be any of the following theory:
1.) You must be working hard and getting backlinks or adding content..etc.
2.) Depend upon your site niche.
3.) Weekend Effect. Some sites traffic goes down on weekend, some sites traffic goes up..
May be on that day your site gets more traffic from other countries such as USA..etc. Did you ever checked from where your site traffic coming from on Monday?
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