Added following failing specs FIRST

    context "#week_day_name_today" do
        it "returns today's week day name" do
            calendar = Calendar.new
            expect(calendar.week_day_name_today).to eql(Time.now.strftime('%A'))
        end
    end

    context "#week_day_number_today" do
        it "returns today's week day number" do
            calendar = Calendar.new
            expect(calendar.week_day_number_today).to eql(Time.now.wday)
        end
    end

Then added the simplest implementation to pass the above failing specs in Calendar class