Calculate the answers to countless questions about the past, present and future with Wolfram|Alpha's powerful algorithms for date and time computation and extensive knowledge of history. Compute the difference between any two dates and times; calculate the time remaining until a holiday or other specified event; or explore sunrise and sunset times, global holidays and notable historical events for any day of the year.
Explore astronomical, historical and other data for specific dates and times.
Compute the time between any two dates or time specifications.
Perform complex computations and arithmetic with dates.