IssueTracker

Build #AI-201.7846.76.42.6582697, built on June 12, 2020
Runtime version: 1.8.0_242-release-1644-b3-6222593 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.15.3
GC: ParNew, ConcurrentMarkSweep
Memory: 1979M
Cores: 12
Registry: ide.new.welcome.screen.force=true, ide.suppress.double.click.handler=true

Studio Build:
Version of Gradle Plugin: 4.0.0
Version of Gradle: 6.5

Steps to Reproduce:

1. Have a project with min API 21
2. Add the line: val date = SimpleDateFormat("YYYYMMdd", Locale.US).format(Date())
3. Forget to notice that lint flags a warning on the usage of YYYY since it's week based year, which is not what most people want.
4. Run the app on a lollipop device, or emulator, ensuring that the above line is executed
5. Notice that the app crashes, since Y as a pattern was introduced in 24.

It would be great if lint could have made it an error to use YYYY if min SDK is below 24. A similar lint rule for other pattern introduced in newer API versions would be great too.