"Ignore tags older than" field appears to be using the commit creation date rather than the tag creation date. This issue happens when you create a new tag on an old commit.

Steps to reproduce

1. Spin up a Jenkins server and install "basic-branch-build-strategies-plugin"
2. Create a multibranch pipeline and point it to a Git repo
3. Select "Build Strategies" > "Tags"
4. Set "Ignore tags older than" field to 1
5. Save this configuration
6. On the Github repo, create a new tag for the initial commit (or any commit older than 1 day)
7. Run the pipeline created in step 2

Expected Results

Jenkins schedules a build for the tag because the tag is not older than 1 day.

  Checking tag v1.0.0
      ‘Jenkinsfile’ found
    Met criteria
Changes detected: v1.0.0 (null → dca3db5e0ee45c6ccc87e6d2423b00d0f237e87a)
Scheduled build for branch: v1.0.0 

Actual Results

The build is skipped despite the tag being less than 1 day old. This is likely due to the commit being older than 1 day.

  Checking tag v1.0.0
      ‘Jenkinsfile’ found
    Met criteria
No automatic build triggered for v1.0.0