2 Peter 3:8 in context: the passage teaches God's patience and the unexpectedness of judgment — not a mathematical formula for calculating dates

Context of 2 Peter 3:8-11: The passage addresses scoffers who ask 'Where is the promise of his coming?' Peter answers that God is not slack but incredibly patient ('one day is as a thousand years') — he can wait as long as necessary. Therefore human lifespans are the wrong unit of measurement for God's timing. The day of the Lord will come 'as a thief in the night' (unexpectedly). The application is ethical: 'what manner of persons ought you to be in holy conduct and godliness.' This is the opposite of a formula for calculating dates; it actively forecloses such calculations. The Psalm 90:4 background ('a thousand years in your sight are like yesterday') confirms it is a metaphor for divine patience, not a conversion rate.