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Discover tools from different categories to expand your toolkit beyond Health.

Calculate the number of days between two dates or add/subtract days from a date. Free online days calculator tool.

Calculate sunrise, sunset, solar noon, twilight times, and day length for any location and date. Free online sun position and daylight calculator.

Simulate API rate limiting with configurable request limits and time windows. Test 429 responses.

Calculate GCD and LCM using Euclidean algorithm with step-by-step solutions