1990

In 1990, both Gordon Lethbridge-Stewart and Luke Rattigan were born.

On 14 February, Owen Harper's tenth birthday, his mother declared that she did not have to like him, only love him. (TV: Adam)

In September, Gordon Lethbridge-Stewart was born to Kate Lethbridge-Stewart. (HOMEVID: Downtime)

On 24 December, Linda Grainger was dumped by her boyfriend in the White Rabbit in London. (PROSE: She Won't Be Home)

Unknown dates
Child genius Luke Rattigan was born in the United States of America. (TV: The Sontaran Stratagem)

The Tenth Doctor's companion Heather McCrimmon was born in Scotland. (COMIC: The Chromosome Connection)