If it is Daylight Savings time, revise the displayed times for h2s

html_js/js/app.js

@@ -9,6 +9,13 @@ let latestOdorData = null;
 let latestBeachData = null;
 
 // --- Date/Time Formatting Helpers ---
+// H2S timestamps are always in PST. When DST is active (PDT), add 1 hour.
+function adjustPSTTimestamp(dayjsObj) {
+  const jan = new Date(dayjsObj.year(), 0, 1).getTimezoneOffset();
+  const now = new Date().getTimezoneOffset();
+  const isDST = now < jan;
+  return isDST ? dayjsObj.add(1, "hour") : dayjsObj;
+}
 function formatDateTime(date, options) {
   // Use i18next's detected language for formatting
   const lang = i18next.language || "en"; // Fallback to 'en'
@@ -66,7 +73,7 @@ function renderH2STable(jsonData) {
       const clockIcon = document.createElement("i");
       clockIcon.className = "bi bi-clock";
       const dateElm = document.createElement("span");
-      let dateWithTime = dayjs(h2s["Date with time"]).toDate(); // Convert to JS Date for Intl
+      let dateWithTime = adjustPSTTimestamp(dayjs(h2s["Date with time"])).toDate(); // Convert to JS Date for Intl
       // Format using Intl based on example 'ddd h A'
       const timeString = formatDateTime(dateWithTime, {
         weekday: "short",

html_js/js/mbmap.js

@@ -685,7 +685,7 @@ function h2s_layer() {
       } else {
         var name = feature.properties["SiteName"].replace(/\([A-Z]+\)/g, "");
       }
-      let date = dayjs(feature.properties["Date with time"]);
+      let date = adjustPSTTimestamp(dayjs(feature.properties["Date with time"]));
       var airnow_link = `https://www.airnow.gov/?city=${feature.properties["Site Name"]}&state=CA&country=USA`;
 
       var result = feature.properties.Result;

html_js/notes.txt

@@ -35,3 +35,6 @@ https://stackoverflow.com/questions/69086721/how-to-render-custom-svg-in-iconlay
 
 
 county link
+
+== note the h2s data is in PST, so when in PDT add an hour.
+