diff --git a/modules/worker/back/methods/worker-time-control/sendMail.js b/modules/worker/back/methods/worker-time-control/sendMail.js
index 2e1e00d83..5fd5f65ff 100644
--- a/modules/worker/back/methods/worker-time-control/sendMail.js
+++ b/modules/worker/back/methods/worker-time-control/sendMail.js
@@ -41,22 +41,10 @@ module.exports = Self => {
         const stmts = [];
         let stmt;
 
-        if (!args.week || !args.year) {
-            const from = Date.vnNew();
-            const to = Date.vnNew();
+        const {date: started, week, year} = Self.getMondayWeekYear(args.week, args.year);
+        args.week = week;
+        args.year = year;
 
-            const time = await models.Time.findOne({
-                where: {
-                    dated: {between: [from.setDate(from.getDate() - 10), to.setDate(to.getDate() - 4)]}
-                },
-                order: 'week ASC'
-            }, myOptions);
-
-            args.week = time.week;
-            args.year = time.year;
-        }
-
-        const started = getStartDateOfWeekNumber(args.week, args.year);
         started.setHours(0, 0, 0, 0);
 
         const ended = new Date(started);
@@ -388,17 +376,6 @@ module.exports = Self => {
         return true;
     };
 
-    function getStartDateOfWeekNumber(week, year) {
-        const simple = new Date(year, 0, 1 + (week - 1) * 7);
-        const dow = simple.getDay();
-        const weekStart = simple;
-        if (dow <= 4)
-            weekStart.setDate(simple.getDate() - simple.getDay() + 1);
-        else
-            weekStart.setDate(simple.getDate() + 8 - simple.getDay());
-        return weekStart;
-    }
-
     function getTime(timeString) {
         const [hours, minutes, seconds] = timeString.split(':');
         return [parseInt(hours), parseInt(minutes), parseInt(seconds)];
diff --git a/modules/worker/back/methods/worker-time-control/weeklyHourRecordEmail.js b/modules/worker/back/methods/worker-time-control/weeklyHourRecordEmail.js
index e352eb3cb..eadbecb00 100644
--- a/modules/worker/back/methods/worker-time-control/weeklyHourRecordEmail.js
+++ b/modules/worker/back/methods/worker-time-control/weeklyHourRecordEmail.js
@@ -55,8 +55,8 @@ module.exports = Self => {
             }
         }, myOptions);
 
-        const dated = getMondayDateFromYearWeek(args.year, args.week);
-        const timestamp = dated.getTime() / 1000;
+        const {date} = Self.getMondayWeekYear(args.week, args.year);
+        const timestamp = date.getTime() / 1000;
 
         const url = `${salix.url}worker/${args.workerId}/time-control?timestamp=${timestamp}`;
         ctx.args.url = url;
@@ -64,23 +64,4 @@ module.exports = Self => {
         await models.WorkerTimeControl.updateMailState(ctx, ctx.args.workerId, myOptions);
         return Self.sendTemplate(ctx, 'weekly-hour-record');
     };
-
-    function getMondayDateFromYearWeek(yearNumber, weekNumber) {
-        const yearStart = new Date(yearNumber, 0, 1);
-        const firstMonday = new Date(yearStart.getTime() + ((7 - yearStart.getDay() + 1) % 7) * 86400000);
-        const firstMondayWeekNumber = getWeekNumber(firstMonday);
-
-        if (firstMondayWeekNumber > 1)
-            firstMonday.setDate(firstMonday.getDate() + 7);
-
-        firstMonday.setDate(firstMonday.getDate() + (weekNumber - 1) * 7);
-
-        return firstMonday;
-    }
-
-    function getWeekNumber(date) {
-        const firstDayOfYear = new Date(date.getFullYear(), 0, 1);
-        const daysPassed = (date - firstDayOfYear) / 86400000;
-        return Math.ceil((daysPassed + firstDayOfYear.getDay() + 1) / 7);
-    }
 };
diff --git a/modules/worker/back/models/worker-time-control.js b/modules/worker/back/models/worker-time-control.js
index 92f1bacf0..cdf51b712 100644
--- a/modules/worker/back/models/worker-time-control.js
+++ b/modules/worker/back/models/worker-time-control.js
@@ -1,4 +1,5 @@
 const UserError = require('vn-loopback/util/user-error');
+const moment = require('moment');
 
 module.exports = Self => {
     require('../methods/worker-time-control/filter')(Self);
@@ -19,4 +20,15 @@ module.exports = Self => {
             return new UserError(`The introduced hour already exists`);
         return err;
     });
+
+    Self.getMondayWeekYear = (week, year) => {
+        if (!week || !year) {
+            const today = Date.vnNew();
+            today.setDate(today.getDate() - 7);
+            week = moment(today).isoWeek();
+            year = moment(today).isoWeekYear();
+        }
+        const date = moment(year, 'YYYY').week(week).startOf('isoweek').toDate();
+        return {date, year, week};
+    };
 };