Add configurable server timezone

server/server.js

@@ -5,6 +5,11 @@
  */
 console.log("Welcome to Uptime Kuma");
 
+// As the log function need to use dayjs, it should be very top
+const dayjs = require("dayjs");
+dayjs.extend(require("dayjs/plugin/utc"));
+dayjs.extend(require("dayjs/plugin/timezone"));
+
 // Check Node.js Version
 const nodeVersion = parseInt(process.versions.node.split(".")[0]);
 const requiredVersion = 14;
@@ -34,10 +39,6 @@ const fs = require("fs");
 
 log.info("server", "Importing 3rd-party libraries");
 
-const dayjs = require("dayjs");
-dayjs.extend(require("dayjs/plugin/utc"));
-dayjs.extend(require("dayjs/plugin/timezone"));
-
 log.debug("server", "Importing express");
 const express = require("express");
 const expressStaticGzip = require("express-static-gzip");
@@ -160,6 +161,7 @@ let needSetup = false;
 (async () => {
     Database.init(args);
     await initDatabase(testMode);
+    await server.initAfterDatabaseReady();
 
     exports.entryPage = await setting("entryPage");
     await StatusPage.loadDomainMappingList();
@@ -1061,10 +1063,15 @@ let needSetup = false;
         socket.on("getSettings", async (callback) => {
             try {
                 checkLogin(socket);
+                const data = await getSettings("general");
+
+                if (!data.serverTimezone) {
+                    data.serverTimezone = await server.getTimezone();
+                }
 
                 callback({
                     ok: true,
-                    data: await getSettings("general"),
+                    data: data,
                 });
 
             } catch (e) {
@@ -1092,9 +1099,14 @@ let needSetup = false;
                 await setSettings("general", data);
                 exports.entryPage = data.entryPage;
 
+                // Also need to apply timezone globally
+                if (data.serverTimezone) {
+                    await server.setTimezone(data.serverTimezone);
+                }
+
                 callback({
                     ok: true,
-                    msg: "Saved"
+                    msg: "Saved " + dayjs()
                 });
 
                 sendInfo(socket);

server/uptime-kuma-server.js

@@ -9,6 +9,7 @@ const Database = require("./database");
 const util = require("util");
 const { CacheableDnsHttpAgent } = require("./cacheable-dns-http-agent");
 const { Settings } = require("./settings");
+const dayjs = require("dayjs");
 
 /**
  * `module.exports` (alias: `server`) should be inside this class, in order to avoid circular dependency issue.
@@ -84,6 +85,13 @@ class UptimeKumaServer {
         this.io = new Server(this.httpServer);
     }
 
+    async initAfterDatabaseReady() {
+        process.env.TZ = await this.getTimezone();
+        dayjs.tz.setDefault(process.env.TZ);
+        log.debug("DEBUG", "Timezone: " + process.env.TZ);
+        log.debug("DEBUG", "Current Time: " + dayjs.tz().format());
+    }
+
     async sendMonitorList(socket) {
         let list = await this.getMonitorJSONList(socket.userID);
         this.io.to(socket.userID).emit("monitorList", list);
@@ -184,6 +192,23 @@ class UptimeKumaServer {
             return clientIP.replace(/^.*:/, "");
         }
     }
+
+    async getTimezone() {
+        let timezone = await Settings.get("serverTimezone");
+        if (timezone) {
+            return timezone;
+        } else if (process.env.TZ) {
+            return process.env.TZ;
+        } else {
+            return dayjs.tz.guess();
+        }
+    }
+
+    async setTimezone(timezone) {
+        await Settings.set("serverTimezone", timezone, "general");
+        process.env.TZ = timezone;
+        dayjs.tz.setDefault(timezone);
+    }
 }
 
 module.exports = {