如何在Postgresql或Javascript中将`2021-3-31 15:51:38`转换为`2021-3-31 15:51:38`，而不是`2021-3-31 3:51:38`

SELECT TO_TIMESTAMP('2021-3-31 15:51:38', 'YYYY-MM-DD HH24:MI:SS');

const dateString = '2021-3-31 15:51:38';
const dateParts = dateString.split(' ');
const date = dateParts[0].split('-');
const time = dateParts[1].split(':');

const year = parseInt(date[0]);
const month = parseInt(date[1]) - 1; // 月份从0开始，所以要减1
const day = parseInt(date[2]);
const hour = parseInt(time[0]);
const minute = parseInt(time[1]);
const second = parseInt(time[2]);

const convertedDate = new Date(year, month, day, hour, minute, second);