Why MySQL inserted/updated dates turn out to be wrong (1 day "older" than the dates in query statements) and how to solve this?

Question

I've faced one strange problem: if I insert or update dates, they are always by 1 day wrong (earlier) than the dates I place in my statements... I tried different solutions (adding to query statenents time, time zones, changing date format etc), but nothing influences the result. Each time I fulfill updates, the date shifts by -1 day! I'm using Node JS server together with mysql2 module; as for the MySQL server, I tried a local server of Xampp and a free test server by remotemysql.com, and on both I have this problem.

To make a situating a bit clearer, I include console logs (from Node JS) of query statements and database server results:

Update query statement:

UPDATE Employees SET fullName = 'Some Random Dude', phone = '931112233', 
gender = 'm', birthDate = '1992-02-18', workStartDate = '2021-01-14', numOfChildren = '0', workType = 
'departmentEmployee', department = '', workLoad = '1.25', currentStatus 
= 'worker', extraInfo = 'some info' WHERE id = 1

Results:

[
TextRow {
id: 1,
fullName: 'Some Random Dude',
phone: 931112233,        
gender: 'm',
birthDate: 1992-02-17T22:00:00.000Z, // 1992-02-17 instead of 1992-02-18
numOfChildren: 0,        
workStartDate: 2021-01-13T22:00:00.000Z, // 2021-01-13 instead of 2021-01-14
workType: 'departmentEmployee',
department: '',
workLoad: '1.25',        
currentStatus: 'worker', 
extraInfo: 'some info'    
}
]

In this example, both workStartDate and birthDate values get distorted by -1 day, and when I perform a search (with a select statement), I also get wrong results... How to solve this?

UPD: the table was created by this statement:

CREATE TABLE IF NOT EXISTS Employees (id int NOT NULL AUTO_INCREMENT, fullName varchar(100), phone int, gender char(1), birthDate date, numOfChildren tinyint, workStartDate date, workType varchar(20), department varchar(80), workLoad dec(3,2), currentStatus varchar(10), extraInfo varchar(255), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci

UPD: my Node js code:

1. a file 'MySQL.js':

        const mysql = require('mysql2');
   
    function createConnection(withDatabase) {
        return new Promise((res, rej) => {
            let connection = mysql.createConnection({
                host: "127.0.0.1",
                port: "3306",
                user: "root",
                database: withDatabase ? "universityDB" : undefined,
                password: "",
            });
            connection.connect(err => {
                if (err) {
                    console.log(err);
                    rej({error: err, logInfo: 'невдала спроба з\'єднання з MySQL сервером'});
                }
                else {
                    console.log("З'єднання з MySQL сервеом було успішно вастановлено.");
                    res(connection);
                }
            });
        });
    }
   
    function query(withDataBase) {
        return function (...args) {
            return createConnection(withDataBase).then(connection => {
                return new Promise((res, rej) => {
                    connection.query(...args, (err, results) => {
                        if (err) {
                            console.log(err);
                            rej({error: err, logInfo: 'хибний запит на MySQL сервер'});
                        } else {
                            //console.log(results)
                            res(results);
                        }
                    });
                }).then(results => {
                    connection.end();
                    return results;
                });
            });
        }
    }
   
    module.exports.query = query(true);
    module.exports.createDB = () => query(false)('CREATE DATABASE IF NOT EXISTS universityDB');
   

2. extracts from the 'dbQueries.js' file:

                function editEmployee({ id, updates }) {
                const { fullName, phone, gender, birthDate, workStartDate, numOfChildren,
                    workType, department, workLoad, currentStatus, extraInfo } = updates;
                const statement = `UPDATE Employees SET fullName = '${fullName}', phone = '${phone}', gender = '${gender}', birthDate = '${birthDate}', workStartDate = '${workStartDate}', numOfChildren = '${numOfChildren}', workType = '${workType}', department = '${department}', workLoad = '${workLoad}', currentStatus = '${currentStatus}', extraInfo = '${extraInfo}' WHERE id = ${id}`;
                console.log(statement)
                return query(statement)
                .catch(() => createEmployeeTableIfNotExists()
                .then(() => query(statement)))
            }
   

3. extracts from the app.js file: const q = require('./dbQueries.js');

            app.patch('/employeesPage', (request, response) => {
                console.log(request.body);
                q.editEmployee(request.body)
                .then(result => {response.status(201).json(result)})
                .catch(err => {
                    response.status(418).json(err);
                });
            });