Dates & Times
With comprehensive information about calendar systems, time zones, historical periods, notable recurring events and more, Wolfram|Alpha is a powerful assistant for questions about dates and times at school, business or home. Get detailed scientific information about ancient geological eras; count down to holidays or other significant events; convert between time zones, calendars and time formats; compute differences between dates or times; or explore useful and fun information about dates, from historical events to corresponding birthstones.
Calculate the current time or a length of time and compute the difference between dates.
Find out the current date and time:
Specify a date by its place on the calendar:
Do computations with birth dates and other data:
Calculate a length of time:
Generate custom calendars and convert dates between calendar systems.
Generate a calendar for a month:
Generate a calendar for a year:
Get information about the calendar:
Recurring Events
Find information about a single recurring event or compare multiple events.
Get information about a recurring event:
Compare information for past events:
Unix Time
Get the Unix encoding for any time or date.
Get the Unix encoding for the current time:
Get the Unix encoding for an arbitrary date and time:
Translate a Unix time encoding:
Birth Flowers
Learn about flowers and flower families traditionally associated with each month.
Find birth flowers for a specified month:
Find out the time zone of any city and learn generally about each specific zone.
Get information about a time zone:
Get the current time in a specified city:
Islamic Prayer Times
Compute prayer times and Qibla direction for any date and location.
Find information about Islamic prayer times:
Learn the dates of significant events or find out what important things happened on a given date.
Get the date of a historical event:
Find notable events in a specified date range:
Learn about geological eons, eras, periods or epochs and their corresponding time frames.
Get information about a geological eon, era, period or epoch:
Find the geological epoch corresponding to a given time:
Wedding Anniversaries
Search for the specific names or gifts associated with any particular wedding anniversary.
Find names for a specified wedding anniversary:
Find gifts associated with all wedding anniversaries:
関連する例
Compute the time until a specific holiday or find the date on which a holiday occurred during any given year.
Compute the date of a holiday:
Compute the dates of holidays for a given year:
Do computations with holidays:
Birth & Death Dates
Find out when and where notable people were born or find out who passed away on any specific date.
Find people born on a specified date:
Find the birth or death date of a person:
Birthstones
Learn what birthstones correspond to each month or to specific dates.