<sod>| launch date = May 18, 2009<ref name="launch date">{{cite web |author=The Wolfram&#124;Alpha Launch Team |url=http://blog.wolframalpha.com/2009/05/08/so-much-for-a-quiet-launch/ |title=So Much for A Quiet Launch |work=Wolfram&#124;Alpha Blog |publisher=Wolfram Alpha |date=May 8, 2009 |accessdate=2013-02-09}}</ref> (official launch) ({{Age in months, weeks and days|year1=2009|month1=05|day1=18}})<br>May 15, 2009<ref name="updated launch detail">{{cite web |author=The Wolfram&#124;Alpha Launch Team |url=http://blog.wolframalpha.com/2009/05/12/going-live-and-webcasting-it/ |work=Wolfram&#124;Alpha Blog |title=Going Live—and Webcasting It |publisher=Wolfram Alpha |date=May 12, 2009 |accessdate=2013-02-09}}</ref> (public launch)<eod>
<sod>| launch date = {{start date and age|2009|5|18}}<ref name="launch date">{{cite web |author=The Wolfram&#124;Alpha Launch Team |url=http://blog.wolframalpha.com/2009/05/08/so-much-for-a-quiet-launch/ |title=So Much for A Quiet Launch |work=Wolfram&#124;Alpha Blog |publisher=Wolfram Alpha |date=May 8, 2009 |accessdate=2013-02-09}}</ref> (official launch)<br>{{start date|2009|5|15}}<ref name="updated launch detail">{{cite web |author=The Wolfram&#124;Alpha Launch Team |url=http://blog.wolframalpha.com/2009/05/12/going-live-and-webcasting-it/ |work=Wolfram&#124;Alpha Blog |title=Going Live—and Webcasting It |publisher=Wolfram Alpha |date=May 12, 2009 |accessdate=2013-02-09}}</ref> (public launch)<eod>