diff --git a/testing/wakapi_api_tests.postman_collection.json b/testing/wakapi_api_tests.postman_collection.json
index b385167..ea76ef8 100644
--- a/testing/wakapi_api_tests.postman_collection.json
+++ b/testing/wakapi_api_tests.postman_collection.json
@@ -3370,57 +3370,53 @@
 					"// pretend we're in Berlin, as this is also the time zone configured for the user",
 					"const userZone = 'Europe/Berlin'",
 					"",
-					"// postman doesn't have moment-timezone package included",
-					"// and we can't just use utcOffset(2), because of summer / winter time",
-					"// inspired by https://stackoverflow.com/a/56853085/3112139",
-					"function getUtcOffset(cb) {",
-					"    let offset = pm.globals.get('utcOffset')",
-					"    if (offset) return cb(offset)",
-					"    pm.sendRequest(`https://worldtimeapi.org/api/timezone/${userZone}`, (err, res) => {",
-					"        offset = res.json().utc_offset",
-					"        pm.globals.set('utcOffset', offset)",
-					"        return cb(offset)",
-					"    })",
+					"// https://stackoverflow.com/a/63199512",
+					"// return UTC offset of timezone in minutes",
+					"function getTimezoneOffset(timeZone, date = new Date()) {",
+					"  const tz = date.toLocaleString(\"en\", {timeZone, timeStyle: \"long\"}).split(\" \").slice(-1)[0];",
+					"  const dateString = date.toString();",
+					"  const offset = Date.parse(`${dateString} UTC`) - Date.parse(`${dateString} ${tz}`);",
+					"  return offset / 1000 / 60;",
 					"}",
 					"",
-					"getUtcOffset((utcOffset) => {",
-					"    const now = moment().utcOffset(utcOffset)",
-					"    const startOfDay = now.clone().startOf('day')",
-					"    const endOfDay = now.clone().endOf('day')",
-					"    const endOfTomorrow = now.clone().add(1, 'd').endOf('day')",
+					"const utcOffset = getTimezoneOffset(userZone);",
 					"",
-					"    // Auth stuff",
-					"    const readApiKey = pm.variables.get('READUSER_API_KEY')",
-					"    const writeApiKey = pm.variables.get('WRITEUSER_API_KEY')",
+					"const now = moment().utcOffset(utcOffset)",
+					"const startOfDay = now.clone().startOf('day')",
+					"const endOfDay = now.clone().endOf('day')",
+					"const endOfTomorrow = now.clone().add(1, 'd').endOf('day')",
 					"",
-					"    console.log(readApiKey)",
+					"// Auth stuff",
+					"const readApiKey = pm.variables.get('READUSER_API_KEY')",
+					"const writeApiKey = pm.variables.get('WRITEUSER_API_KEY')",
 					"",
-					"    if (!readApiKey || !writeApiKey) {",
-					"        throw new Error('no api key given')",
-					"    }",
+					"console.log(readApiKey)",
 					"",
-					"    pm.variables.set('READUSER_TOKEN', base64encode(readApiKey))",
-					"    pm.variables.set('WRITEUSER_TOKEN', base64encode(writeApiKey))",
+					"if (!readApiKey || !writeApiKey) {",
+					"    throw new Error('no api key given')",
+					"}",
 					"",
-					"    function base64encode(str) {",
-					"        return Buffer.from(str, 'utf-8').toString('base64')",
-					"    }",
+					"pm.variables.set('READUSER_TOKEN', base64encode(readApiKey))",
+					"pm.variables.set('WRITEUSER_TOKEN', base64encode(writeApiKey))",
 					"",
-					"    // Heartbeat stuff",
-					"    pm.variables.set('tsNow', now.clone().format('x') / 1000)",
-					"    pm.variables.set('tsNowMinus1Min', now.clone().add(-1, 'm').format('x') / 1000)",
-					"    pm.variables.set('tsNowMinus2Min', now.clone().add(-2, 'm').format('x') / 1000)",
-					"    pm.variables.set('tsNowMinus3Min', now.clone().add(-3, 'm').format('x') / 1000)",
-					"    pm.variables.set('tsStartOfDay', startOfDay.format('x') / 1000)",
-					"    pm.variables.set('tsEndOfDay', endOfDay.format('x') / 1000)",
-					"    pm.variables.set('tsEndOfTomorrow', endOfTomorrow.format('x') / 1000)",
-					"    pm.variables.set('tsStartOfDayIso', startOfDay.toISOString())",
-					"    pm.variables.set('tsEndOfDayIso', endOfDay.toISOString())",
-					"    pm.variables.set('tsEndOfTomorrowIso', endOfTomorrow.toISOString())",
-					"    pm.variables.set('ts1', now.clone().startOf('hour').format('x') / 1000)",
-					"    pm.variables.set('ts2', now.clone().startOf('hour').add(1, 'm').format('x') / 1000)",
-					"    pm.variables.set('ts3', now.clone().startOf('hour').add(2, 'm').format('x') / 1000)",
-					"})"
+					"function base64encode(str) {",
+					"    return Buffer.from(str, 'utf-8').toString('base64')",
+					"}",
+					"",
+					"// Heartbeat stuff",
+					"pm.variables.set('tsNow', now.clone().format('x') / 1000)",
+					"pm.variables.set('tsNowMinus1Min', now.clone().add(-1, 'm').format('x') / 1000)",
+					"pm.variables.set('tsNowMinus2Min', now.clone().add(-2, 'm').format('x') / 1000)",
+					"pm.variables.set('tsNowMinus3Min', now.clone().add(-3, 'm').format('x') / 1000)",
+					"pm.variables.set('tsStartOfDay', startOfDay.format('x') / 1000)",
+					"pm.variables.set('tsEndOfDay', endOfDay.format('x') / 1000)",
+					"pm.variables.set('tsEndOfTomorrow', endOfTomorrow.format('x') / 1000)",
+					"pm.variables.set('tsStartOfDayIso', startOfDay.toISOString())",
+					"pm.variables.set('tsEndOfDayIso', endOfDay.toISOString())",
+					"pm.variables.set('tsEndOfTomorrowIso', endOfTomorrow.toISOString())",
+					"pm.variables.set('ts1', now.clone().startOf('hour').format('x') / 1000)",
+					"pm.variables.set('ts2', now.clone().startOf('hour').add(1, 'm').format('x') / 1000)",
+					"pm.variables.set('ts3', now.clone().startOf('hour').add(2, 'm').format('x') / 1000)"
 				]
 			}
 		},