The activity calendar gives skewed results when switching to winter time

Everyone can contribute. Help move this issue forward while earning points, leveling up and collecting rewards.

Summary

The time is probably set to a specific time zone when the list is generated. This leads to inconsistent results when switching to winter time. Everything between midnight and 1 AM is shifted to another day, except when requesting a list of contributions.

Steps to reproduce

Selecting a blank day with contributions between midnight and 1 a.m. on summer time days

Example

On my server: https://git.ikilote.net/Zefling

What is the current bug behavior?

During winter time, some tiles are empty, whereas before the change this was not the case.

What is the expected correct behavior?

That there be no change to the time change

Relevant logs and/or screenshots

image.png

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info

 ystem information \\ System:         Ubuntu 22.04 \\ Current User:   git \\ Using RVM:      no \\ Ruby Version:   3.2.8 \\ Gem Version:    3.7.1 \\ Bundler Version:2.7.1 \\ Rake Version:   13.0.6 \\ Redis Version:  7.2.10 \\ Sidekiq Version:7.3.9 \\ Go Version:     unknown \\ \\ GitLab information \\ Version:        18.5.1 \\ Revision:       2e5ae10576d \\ Directory:      /opt/gitlab/embedded/service/gitlab-rails \\ DB Adapter:     PostgreSQL \\ DB Version:     16.10 \\ URL:            https://git.ikilote.net \\ HTTP Clone URL: https://git.ikilote.net/some-group/some-project.git \\ SSH Clone URL:  git@git.ikilote.net:some-group/some-project.git \\ Using LDAP:     no \\ Using Omniauth: yes \\ Omniauth Providers:  \\ \\ GitLab Shell \\ Version:        14.45.3 \\ Repository storages: \\ - default:      unix:/var/opt/gitlab/gitaly/gitaly.socket \\ GitLab Shell path:              /opt/gitlab/embedded/service/gitlab-shell \\ \\ Gitaly \\ - default Address:      unix:/var/opt/gitlab/gitaly/gitaly.socket \\ - default Version:      18.5.1 \\ - default Git Version:  2.50.1\\    

Edited by Zéfling