Header date sometimes off by multiple days

[michewl]

Describe the bug

The date in the header created for --tag with a config like this {{ timestamp | date(format="%Y-%m-%d") }} (from the detailed.toml) is sometimes off by multiple days.

Adding a timezone or locale does not change the generated date. Using %F as format also generates the wrong date.

It does not seem to be the case for header dates of previous versions, so I believe it is related to the --tag flag.

Timestamp value from context: 1661348531
This should generate 2022-08-29, but will generate 2022-08-24

To Reproduce

Steps to reproduce the behavior:

1. Generate a changelog that has above template in the config with --tag 1.2.3 for the "unreleased changes".

The full command I use is: git cliff --config .config/cliff.toml --output CHANGELOG.md --tag 1.2.3

Expected behavior

The date should be the correct one for the timestamp in the context (--context).

System (please complete the following information):

• OS Information: Pop!_OS 22.04 LTS Linux 5.19.0-76051900-generic x86_64 GNU/Linux
• Git Cliff Version: git-cliff 0.9.0
• Git Version: git version 2.34.1

[michewl]

I think I am mistaken with the timestamp example, but the time still seems to be off when using the --tag flag (git-cliff 0.9.2).

This might be the expected behavior, and I am mistaken for what the timestamp does. I would expect when using --tag, that it uses "now".

I think however, that it uses the date from the latest commit?
Can this be configured to use now in case of --tag, but not for the other regular git tags that already exist?

[orhun]

I think I am mistaken with the timestamp example, but the time still seems to be off when using the --tag flag (git-cliff 0.9.2).

This might be the expected behavior, and I am mistaken for what the timestamp does. I would expect when using --tag, that it uses "now".

I think however, that it uses the date from the latest commit? Can this be configured to use now in case of --tag, but not for the other regular git tags that already exist?

Good point! I implemented it in e2cd07b

--tag uses now from now on.