Sites sobre datas [+Cálculos & Fatos]

Faz tempo que queria calcular com exatidão minha idade. Tentei já várias vezes mas sempre acabava echendo o saco e desistindo da tarefa. Mas a alguns dias navegando pela internet encontro o site Day of Birth.
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Vamos ver:

Hoje é dia 25/05/2008

• You were born on a Thursday.
• Your star sign is Virgo.
• Your birthstone is Sapphire.
• The season was Summer.
• You were born in the Chinese year of the Hare.
• The US President was Ronald Reagan (Republican).
• The UK Prime Minister was Margaret Thatcher (Conservative).
• You are 20 years 8 months 8 days old.
• It is 115 days until your next birthday.
• You are 7,556 days old.
• You are approximately 181,360 hours old.
• You are approximately 652,894,990 seconds old.

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Outro site legal sobre datas é o The Death Report. Nele você sabe quem morreu no dia do seu nasciento como também catástrofes que ocorreram.