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Happy New Year from New Hampshire! We've got 3 inches of snow on the ground and patches of ice all over the driveway. Unlike many of you, we heat our house with oil (closer to ...

Ethereum returned -10.96% in 2025, from $3,332.41 to $2,967.04. ETH hit a new all-time high of $4,953 in August.

Bitcoin returned -6.33% in 2025, from $93,425.10 to $87,508.83. The year saw a new all-time high of $126,198 in October.

The Dow Jones Industrial Average returned 12.67% in 2025, or 14.92% with dividends reinvested. See price and total return calculations.

The NASDAQ returned 19.78% in 2025, or 20.56% with dividends reinvested. See how the tech-heavy index performed this year.

The S&P 500 returned 15.96% in 2025, or 17.44% with dividends reinvested. See how the index performed with price and total returns.

Calculate dates thousands of years in the past. Enter a number of millennia and see the historical date, including BC/AD conversion.

Project dates thousands of years into the future. Enter a number of millennia and see the far-future date in years, decades, and centuries.

Calculate the number of millennia between any two dates. See results in millennia, centuries, decades, and years.

Project dates centuries into the future. Enter a number of centuries and see the far-future date, with conversions to years, decades, and days.