Display times in schedule always in 24h format (graphql#2103)

* Display times in schedule always in 24h format

* Add a comment

Author: hasparus

src/app/conf/2025/schedule/_components/format-block-time.tsx

@@ -3,6 +3,7 @@ import { parseISO } from "date-fns"
 const timeFormat = new Intl.DateTimeFormat(undefined, {
   hour: "2-digit",
   minute: "2-digit",
+  hour12: false, // per Carolyn's request
 })
 
 export const formatBlockTime = (start: string, end?: Date) => {