Mocking the current time in sinon

I am writing integration tests for my application that uses connects to mongodb. I write the entity creation time to db and use Date.now() for that. My application is time sensitive and hence I want to mock the current time such that my tests always work. I have tried examples shared on multiple other similar posts but not able to get a working solution for me.

I try adding

const date = new Date()
date.setHours(12)
sandbox.stub(Date, "now").callsFake(function() {return date.getTime()})

in my beforeEach method but it has no impact.

I also tried

const date = new Date()
date.setHours(12)

sinon.useFakeTimers({
    now: date,
    shouldAdvanceTime: true
})

But this throws my mongoose schema validation for a toss and throws

Invalid schema configuration: `ClockDate` is not a valid type at path `createdDate`

What is the right way to achieve this?