Honestly, as a parent, everything is about last night. Kids sleep well / only woke once / only woke twice? Today is manageable! I am woman, hear me roar! I can function as a normal human being!
Kids decide they needed to wake up every hour / countless times or be plagued by nightmares / thirst / needing to hold hands? Today is one long road to bedtime, fueled by caffeine and sugar. Normal human beings are so far from related to me I may be a chimp. And not the cute kind.