feat: may day greetings

web/src/lib/util/greetMessage.ts

@@ -42,6 +42,17 @@ const getHolidayGreeting = (username: string, date: Date): [string, string] | nu
 				]
 			}
 		},
+		5: {
+			1: {
+				name: "May Day",
+				greetings: [
+					`Happy May Day, ${username}!`,
+					`Spring celebrations await, ${username}!`,
+					`Enjoy the festivities, ${username}!`,
+					`Hyvää Vappua, ${username}!`
+				]
+			}
+		},
 		10: {
 			31: {
 				name: "Halloween",