endoflife-date-release-data/releases/pop_os.json

{
  "22.04": "2022-04-25",
  "21.10": "2021-12-14",
  "21.04": "2021-06-30",
  "20.10": "2020-10-23",
  "20.04": "2020-05-01",
  "19.04": "2019-04-20",
  "18.10": "2018-10-20"
}