Create a Date with a set timezone without using a string representation

Question

I have a web page with three dropdowns for day, month and year. If I use the JavaScript Date constructor that takes numbers, then I get a Date obje

Answer 1

GMT -03:00 Example

new Date(new Date()-3600*1000*3).toISOString();  // 2020-02-27T15:03:26.261Z

Or even

now  = new Date().getTime()-3600*1000*3; // 1582818380528
data = new Date(now).toISOString();      // 2020-02-27T15:03:26.261Z