DateTime.UtcNow returns 0001-01-01T00:00:00

"createdAt": "2023-12-27T13:57:08.3933333",
    "modifiedAt": "0001-01-01T00:00:00"

public override async Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
{
    DateTime now = DateTime.UtcNow;

    foreach (var entry in ChangeTracker.Entries<BaseEntity>())
    {
        switch (entry.State)
        {
            case EntityState.Added:
                if (entry.Entity.CreatedAt == DateTime.MinValue)
                {
                    entry.Entity.CreatedAt = now;
                }
                entry.Entity.ModifiedAt = now;
                break;

            case EntityState.Modified:
                entry.Entity.ModifiedAt = now;
                break;
        }
        Console.WriteLine($"Entity Type: {entry.Entity.GetType().Name}, State: {entry.State}, CreatedAt: {entry.Entity.CreatedAt}, ModifiedAt: {entry.Entity.ModifiedAt}");
    }

    return await base.SaveChangesAsync(cancellationToken);
}
}