The Royal 30 April 2013

Carl XVI Gustav (King of Sweden) celebrates his 67th birthday at the same time as ...

Carl XVI Gustav

Queen Beatrix of the Netherlands (age 75) abdicated in favor of her son ...

Beatrix; Queen 30 April 1980 - 30 April 1213

Willem-Alexander of the Netherlands (age 46) who was crowned King of the Netherlands the same day. 
He is now the first king to ascend the throne in 122 years. Why? It is an interesting story:

William III

King William III died 1890 (age 73) and as his three sons had died befour him it was his youngest child, princess Wilhelmina, then only 10 years old who officially succeeded him.

Wilhelmina

Wilhelmina herself, who at the time had recently become 68 years old, abdicated in favor of her only child Juliana in 1948 after nearly 58 years as queen.

Juliana

When Juliana celebrated her 71th birthday she also abdicated in favor of the oldest of her daughters, Beatrix.

Beatrix

Beatrix herself, like her mother and grandmother, abdicated in the end at the age of 75 in favour of her oldest son, the now king Willem-Alexander who now is the youngest monarch in Europe.

Willem-Alexander as king

Will he one day follow the women in his family's footsteps and abdicate in around 30 years of time in favour of his daughter?