Get the current time in a specified timezone. Returns detailed time information including year, month, day, hour, minute, second, weekday, week of year, day of year, and UTC offset.

Convert between Gregorian (solar) and Chinese Lunar calendar. Includes Ganzhi (天干地支), zodiac animal, solar terms, and festival information.

Convert a datetime from one timezone to another. Input can be an ISO 8601 string.

List IANA timezones with current offset and time. Uses the system's full IANA timezone database. Can filter by query text or continent.

Add or subtract time from a date. Supports Gregorian mode, Lunar mode, and anchor mode (calculate relative to a named festival).

Calculate the difference between two dates/times. Returns the difference in years, months, days, hours, minutes and also total days/hours/minutes.

Parse a Unix timestamp (seconds or milliseconds) or ISO 8601 string into detailed date/time components.

Get festivals, solar terms, and public holidays within a date range. Supports Chinese (lunar and solar) festivals and public holidays from various countries.

Get detailed information about a specific month including number of days, first/last day weekday, whether it's a leap year, and quarter.

Calculate a countdown from now to a target date/time. Returns remaining days, hours, minutes, seconds and whether the date is in the past.

Calculate business days between two dates or add/subtract business days from a date. Skips weekends and optionally public holidays.

Get Chinese almanac (黄历/老黄历) information for a specific date. Includes suitable activities (宜), things to avoid (忌), conflict zodiac (冲), lucky directions, and more.

Manage persistent countdown timers. Supports CRUD operations: set (create), get (read one), list (read all), delete.