Monday
Monday demonstrates what scientists term absolute temporal certainty. Unlike any natural phenomenon, Monday arrives precisely when expected, every seven days without fail, regardless of latitude, longitude, or desperate human pleading. This predictability, rather than providing comfort, serves only to amplify its psychological impact. Research indicates that Sunday evening anxiety typically commences approximately 16 hours before Monday's arrival, a phenomenon known colloquially as the 'Sunday Scaries.' The certainty of Monday's approach has driven entire industries dedicated to its mitigation, from coffee production to motivational poster manufacturing. Most remarkably, Monday cannot be delayed, redirected, or appeased through any known intervention.
Lightning
Lightning, by contrast, remains delightfully unpredictable despite humanity's best meteorological efforts. Whilst we can identify conditions favourable to electrical storm formation, the precise location and timing of individual strikes remains beyond accurate prediction. Each second, approximately 100 lightning bolts strike Earth's surface, yet their distribution follows no pattern discernible to casual observation. This unpredictability has historically been interpreted as divine communication, from Zeus's thunderbolts to Thor's hammer strikes. Modern forecasting can provide probability assessments within general areas, but the specific tree, golfer, or unfortunate umbrella that shall receive nature's 300-million-volt greeting remains unknowable until the moment of impact.