Pure whipped cream will only last a few hours in the fridge without losing its loft, even if you whip it to very firm peaks. The deterioration will become more pronounced over time. You can always revive the whip cream by re-whipping it. If you want to make this ahead of time (e.g. for a dinner party) or prefer to pipe out the cream for a more embellished look, try making mascarpone-stabilized whip instead.