sigo recibiendo el error

 "Cannot read properties of undefined (reading '2') at script.js:18:47"

a menos que lo ponga en una función if.

Aquí está la matriz

 ['title','title',new Date("2022-03-26T10:00:00-06:00"),new Date("2022-04-02T10:00:00-06:00")], ['title','title',new Date("2022-04-02T10:00:00-06:00"),new Date("2022-04-09T10:00:00-06:00")], ['title', 'title', new Date("2022-04-09T10:00:00-06:00"), new Date("2022-04-16T10:00:00-06:00")], ['title', 'title', new Date("2022-04-16T10:00:00-06:00"), new Date("2022-04-23T10:00:00-06:00")], ['title', 'title', new Date("2022-04-23T10:00:00-06:00"), new Date("2022-04-30T10:00:00-06:00")], ['title', 'title', new Date("2022-04-30T10:00:00-06:00"), new Date("2022-05-07T10:00:00-06:00")], ['title', 'title', new Date("2022-05-07T10:00:00-06:00"), new Date("2022-05-14T10:00:00-06:00")], ['title', 'title', new Date("2022-05-14T10:00:00-06:00"), new Date("2022-05-21T10:00:00-06:00")], ['title', 'title', new Date("2022-05-21T10:00:00-06:00"), new Date("2022-05-28T10:00:00-06:00")] ];

No funciona:

 var today = Date.now(); var weeksPassed = Math.floor((today - Date.parse(nextRelease))/(24*3600*1000*7)); var latestRelease = episodeList[weeksPassed][2]; var nextRelease = episodeList[weeksPassed][3]; document.getElementById("previousEpisode").innerHTML = episodeList[weeksPassed][0]; document.getElementById("nextEpisode").innerHTML = episodeList[weeksPassed][1]

Obras:

 var nextRelease = new Date("2022-03-26T10:00:00-06:00"); var today = Date.now(); if (today > nextRelease) { var weeksPassed = Math.floor((today - Date.parse(nextRelease))/(24*3600*1000*7)); latestRelease = episodeList[weeksPassed][2]; nextRelease = episodeList[weeksPassed][3]; document.getElementById("previousEpisode").innerHTML = episodeList[weeksPassed][0]; document.getElementById("nextEpisode").innerHTML = episodeList[weeksPassed][1] };