Kate Middleton has made a quick return to her royal duties despite having given birth to her second child, Princess Charlotte, little more than a week ago. The Duchess of Cambridge penned a letter, released Monday, on behalf of Children’s Hospice Week, a weeklong fundraising program to support families of children with life-limiting conditions.

The 33-year-old wrote the letter to encourage support and raise awareness for the May 11-17 venture. The letter, sent from Kensington Palace and released by the charity leading the event, Together for Short Lives, explained the importance of giving love and support to children with serious illnesses, saying time with them should always be “cherished and celebrated,” Us Weekly quoted.

"Children’s hospices strive to create happy moments in the most difficult times any family could face. I hope you will join me in supporting Children’s Hospice Week and work to make every moment count for all of our families,” the duchess said. Kate and the charity are also urging people to share a memorable moment on social media with the hashtag #momentscount.

The Mirror reported Children’s Hospice Week will bring the U.K.’s 53 children’s hospices and palliative care services together for games and bonding activities for the children and their families “to make the most of time they have together,” Barbara Gelb, CEO of Together for Short Lives, said. There are approximately 49,000 children in the U.K. living with life-limiting illnesses, leading to early death.

Kate has been the royal patron of East Anglia’s Children Hospices, or EACH, since January 2012, which was one of her first roles after marrying a member of the royal family. In November last year, she tearfully consoled one mother whose child was being cared for at one at the hospices before the child died.

Prince William’s wife had not been expected to go back to work for several months following the birth of the infant princess. Kate, together with her husband and children, traveled to their country home in Norfolk last week where she and William decided to raise their children away from the world’s media, International Business Times Australia reported.

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