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Use UTC time for date handling to ensure consistency across time zones #16

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443e540
Use UTC time for date handling to ensure consistency across time zones
RyanMorash Aug 5, 2025
542fa68
Use UTC time for date handling in getWordOfTheDay function for consis…
RyanMorash Aug 5, 2025
38d261e
Revert "Use UTC time for date handling in getWordOfTheDay function fo…
RyanMorash Aug 5, 2025
2725caf
Fix Copilot review suggestions
RyanMorash Aug 5, 2025
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26 changes: 15 additions & 11 deletions script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ var firstGame = true;
var expiredSession = false;
const allowExpiration = false; // Wordle doesn't have expiration, but I may want to implement this eventually, who knows

const firstgameMilli = new Date(2022, 8, 4, 0, 0, 0, 0).getTime();
const firstgameMilli = Date.UTC(2022, 8, 4, 0, 0, 0, 0);
const dayLength = 1000*60*60*24;
var gameNumber;

Expand Down Expand Up @@ -53,10 +53,11 @@ initializeGame();

function getGameNumber() {
let curdate = new Date();
curdate.setMilliseconds(0);
curdate.setSeconds(0);
curdate.setMinutes(0);
curdate.setHours(0);
// Use UTC/GMT time instead of local time
curdate.setUTCMilliseconds(0);
curdate.setUTCSeconds(0);
curdate.setUTCMinutes(0);
curdate.setUTCHours(0);

let curdateMilli = curdate.getTime();
let dif = curdateMilli - firstgameMilli;
Expand All @@ -70,10 +71,11 @@ function getGameNumber() {
}

function getAbsoluteDate(date) {
date.setMilliseconds(0);
date.setSeconds(0);
date.setMinutes(0);
date.setHours(0);
// Use UTC/GMT time instead of local time
date.setUTCMilliseconds(0);
date.setUTCSeconds(0);
date.setUTCMinutes(0);
date.setUTCHours(0);
}

function addZeros(num, digits = 2) {
Expand Down Expand Up @@ -178,7 +180,7 @@ function initializeGame() {
// The first game will last ~48 hours
}

gameTimerNext.setDate(gameTimerNext.getDate() + 1);
gameTimerNext.setUTCDate(gameTimerNext.getUTCDate() + 1);

updateMobileHeight();
}
Expand Down Expand Up @@ -482,7 +484,9 @@ function getWordOfTheDay(seed) {
// Practice mode
if (seed === undefined) {
let curDate = new Date();
let func = mulberry32(curDate.getTime());
// Use UTC time for consistency
let utcDate = new Date(Date.UTC(curDate.getUTCFullYear(), curDate.getUTCMonth(), curDate.getUTCDate()));
let func = mulberry32(utcDate.getTime());
let num = Math.floor(func() * wordList.length);

return wordList[num];
Expand Down