How to convert a large numeric value to valid date?

I am using Stripe for processing payment online.

In Stripe when we use any API the date is returned as a Big Integer value.

Here is sample JSON snippet:

"collection_method": "charge_automatically",
            "created": 1688385899,
            "currency": "usd",
            "current_period_end": 1720008299,
            "current_period_start": 1688385899,
            "customer": "cus_OC9oTx8362sYQa",
            "days_until_due": null,
            "default_payment_method": "pm_1NPlV0AfDrK8cFljsTuBu1N8",
            "default_source": null,
            "default_tax_rates": [],
            "description": null,
            "discount": null,
            "ended_at": null,

How to convert this value to a valid Date?

For example created or current_period_start or current_period_end