Yes, this feels like calculating to the second when you need to arrive at the airport so you'll spend zero time at the airport.

Instead, arrive a bit early to the airport, and analogously, don't run visas down to the last hour based on the minutiae of Moroccan timezones etc.

> You should not be counting days or nights because you should not let yourself be in the country anywhere near the expiry of a visa.

You're privileged if you're able to do so. In many occasions people have single-entry visas with one day leeway from tickets submitted to the consulate.

For USA, A Visa is a right to request entry into the country. The I-94 defines the duration you are authorized to stay. You can have an expired Visa and time left on you I-94 and remain in the country.