Just know that you are not alone when you are missing loved ones. Lost my Mom to cancer just over 5 years ago. Then 5 months after that lost we lost our 18 year old son to a car accident. You are not alone in your grief. Birthdays and holidays are pretty tough. I miss them something terrible. You will get through it, but you will never get over it. Wise words from an uncle after we lost our son. Wish I had more words to make it easier, but I do not know what they would be.
Take her to a favorite place and experience the sun setting, taking in every moment as it slowly sinks behind God's majestic creation, knowing that as the day ends here it has a new majestic beginning in another place.
Watch, O Lord, with those who wake, or watch, or weep tonight, and give Your angels charge over those who sleep.
Tend Your sick ones, O Lord Christ. Rest Your weary ones. Bless Your dying ones. Soothe Your suffering ones. Pity Your afflicted ones. Shield Your joyous ones. And for all Your love's sake.
Amen.