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GitHub Profile Time Converter

Convert GitHub profile local time from 24-hour format (e.g. “00:00”) to the 12-hour AM/PM style.

  1. // ==UserScript==
  2. // @name         GitHub Profile Time Converter
  3. // @namespace    https://github.com/GooglyBlox
  4. // @version      1.1
  5. // @description  Convert GitHub profile local time from 24-hour format (e.g. “00:00”) to the 12-hour AM/PM style.
  6. // @author       GooglyBlox
  7. // @match        https://github.com/*
  8. // @match        https://gist.github.com/*
  9. // @grant        none
  10. // @run-at       document-end
  11. // @license      MIT
  12. // ==/UserScript==
  13.  
  14. (function () {
  15.   'use strict';
  16.  
  17.   function convertTo12Hour(timeStr) {
  18.     const parts = timeStr.split(':');
  19.     if (parts.length !== 2) return timeStr;
  20.     let hours = parseInt(parts[0], 10);
  21.     const minutes = parts[1];
  22.     const suffix = hours >= 12 ? 'PM' : 'AM';
  23.     hours = hours % 12;
  24.     if (hours === 0) hours = 12;
  25.     return hours + ':' + minutes + ' ' + suffix;
  26.   }
  27.  
  28.   function updateLocalTime() {
  29.     const localTimeItem = document.querySelector('li[itemprop="localTime"]');
  30.     if (!localTimeItem) return;
  31.  
  32.     const labelEl = localTimeItem.querySelector('.p-label');
  33.     if (!labelEl || !labelEl.firstChild) return;
  34.  
  35.     if (labelEl.textContent.match(/\b(AM|PM)\b/)) return;
  36.  
  37.     const timeRegex = /(\d{2}:\d{2})/;
  38.     const originalText = labelEl.firstChild.textContent;
  39.     const match = originalText.match(timeRegex);
  40.     if (!match) return;
  41.  
  42.     const originalTime = match[1];
  43.     const convertedTime = convertTo12Hour(originalTime);
  44.  
  45.     labelEl.firstChild.textContent = originalText.replace(originalTime, convertedTime);
  46.   }
  47.  
  48.   updateLocalTime();
  49.  
  50.   const observer = new MutationObserver((mutations) => {
  51.     mutations.forEach(() => {
  52.       updateLocalTime();
  53.     });
  54.   });
  55.  
  56.   observer.observe(document.body, { childList: true, subtree: true });
  57. })();