Activity history not updated when historical commits uploaded

Summary

I've noticed that the activity history doesn't get updated for previous days when I commit new changes - it only shows that I uploaded the commits on the day I uploaded them. GitHub, on the other hand, adds the activity for the day(s) the commits were authored, and doesn't add anything on the day the commits are actually uploaded.

This might be an intentional design difference, in which case I guess this can be closed almost immediately.

Steps to reproduce

1. Create a new test project.
2. Commit a change today.
3. Come back tomorrow and commit another change.
4. Push the changes.
5. Observe that yesterday's changes show up only in the activity history for today, despite that you actually committed the change yesterday.

Example Project

I don't think this is applicable.

What is the current bug behavior?

Described above.

What is the expected correct behavior?

Activity history is updated for the days the commits were actually made.

Relevant logs and/or screenshots

N/A

Output of checks

This bug happens on gitlab.com.

Results of GitLab environment info

N/A?

Results of GitLab application Check

N/A?

Possible fixes

If you can, link to the line of code that might be responsible for the problem - unsure, have not looked at source code.