For anyone who has experienced loss, they'll know the grieving process affects people very differently. For some, each day can feel a little better, but for others, it can be months or even years before the grief hits them.
For Carol Vorderman, her mother's passing took a while to affect her. The 57-year-old star's mum Jean passed away in June last year aged 88 following a battle with cancer. Carol has now admitted that she cried for an entire day as the sad anniversary of her death approached.
Opening up on ITV's Lorraine, she said: "It hit me like a wave. I couldn't stop crying. It was like tsunami of grief, and then it just stopped."
Despite the outpouring of emotion now, Carol, who cared for her mum every day before her death, explained how she couldn't understand why she "didn't cry" at the time of her mum's passing.
She added: "I just didn't cry. I didn't really think about her. It can't just be me who goes through it.
"I loved her. We could not have a closer bond. I adored the ground she walked on. So why is it that it just hasn't come? I don't understand it."
The former Countdown star also admitted she felt "a freedom" in her life after her mum died.
She explained: "I took her everywhere, looked after her and did everything for her. I have a freedom I didn't have before - it was a joy to look after her.
"But I'm not lying, anyone with an elderly parent - that's hard, I was with her every day."
A few weeks after Jean's death, Carol revealed her life was returning to normality.
She said at the time: "I am gradually re-engaging with life. She was an amazing lady and was always with me. She worked for me since I was 25. I miss her terribly.
"There was nothing left unsaid or undone as she'd say. 'It's not a tragedy, I'm nearly 89 and had a great life.' "