Replace `new Date()` with `Date.now()` where appropriate

static/infobeamer/index.html

@@ -26,7 +26,7 @@
         }
 
         function render(talk) {
-            const now = new Date();
+            const now = Date.now();
             const max = talk.end - talk.start;
 
             let value = 0;
@@ -59,7 +59,7 @@
             const resp = await fetch("https://static.rc3.world/schedule/everything.json");
             const schedule = await resp.json();
 
-            const now = new Date();
+            const now = Date.now();
 
             const upcoming = [];
             for (const day of schedule.schedule.conference.days) {