Why Prince William and Duchess Kate skipped Prince Charles's birthday party

Newly-wed royals, Meghan Markle and Prince Harry, postponed their honeymoon to attend Prince Charles garden party. However, Prince William and Kate Middleton were noticeably absent from the event.

A garden party was held in honor of Prince Charles' 70th birthday at Buckingham Palace.

The Duchess of Sussex made her first public appearance delivering her royal duties while Prince Harry made a speech in honor of his father. Harry also confirmed the location of his brother and sister-in-law in his speech.

The Duke and Duchess of Cambridge, William and Middleton, could not make it to the event for separate reasons. William attended the Manchester Arena National Service of Commemoration at the Manchester Cathedral.

The day marked one year since the attack on Manchester Arena. A suicide bomber detonated a shrapnel bomb after people started vacating the premises after Ariana Grande's concert on May 22, 2017.

On the other hand, Middleton was on maternity leave post the birth of her third child, son Louis, as reported by Express.

William's attendance at the Manchester Arena served an important purpose. The multi-faith service remembered all those who lost their lives in the horrible tragedy that took place last year.

The commemorative event also gave thanks to emergency workers that assisted on the ground and helped officials through the aftermath of the incident. It was attended by survivors and family members of the bereaved.

William delivered an emotional speech on the occasion and honored the victims by placing a message on the Tree of Hope memorial.

Middleton was on her maternity break following the royal tradition where new mothers in the family take a six-month break from their official duties.

Although Middleton attended the wedding function of Prince Harry and Meghan Markle, it does not count.

A wedding is considered as a family function and Middleton is allowed to pick her own engagements, according to Royal biographer Duncan Larcombe.

Prince Charles was born on November 14, 1948. However, since the 70th year is a milestone for Charles, his birthday will be celebrated multiple times throughout the year, according to People.