Сколько тебе было когда...
You said your birthday is 3 / 19 / 1990
which means you are 19 years old and about:

73 years 4 months younger than Walter Cronkite, age 93
68 years 8 months younger than Nancy Reagan, age 88
65 years 9 months younger than George Herbert Bush, age 85
58 years 6 months younger than Barbara Walters, age 78
56 years 4 months younger than Larry King, age 75
50 years 1 month younger than Ted Koppel, age 69
46 years 8 months younger than Geraldo Rivera, age 66
43 years 8 months younger than George W. Bush, age 63
38 years 8 months younger than Jesse Ventura, age 58
34 years 5 months younger than Bill Gates, age 54
29 years 7 months younger than Cal Ripken Jr., age 49
23 years 9 months younger than Mike Tyson, age 43
19 years 8 months younger than Jennifer Lopez, age 39
14 years 3 months younger than Tiger Woods, age 33
7 years 9 months younger than Prince William, age 27

and that you were:

11 years old at the time of the 9-11 attack on America
9 years old on the first day of Y2K
7 years old when Princess Diana was killed in a car crash
5 years old at the time of Oklahoma City bombing
4 years old when O. J. Simpson was charged with murder
2 years old at the time of the 93 bombing of the World Trade Center
not yet 1 year old when Operation Desert Storm began