<human>: I'll try to keep this as brief as possible and I apologize if this subreddit isn't the correct place to post this but I've seen great advice given here before.

My coworker of about 2 years Jane's birthday was a few weeks ago. She was on vacation the entire week of her birthday. Our jobs have been extremely stressful and busy within the past couple months because we are going through a large transition. Although we all wished her Happy Birthday on her birthday though texts and Facebook, we unfortunately forgot to get her a gift as time passed because of how busy we have all been.

My boss did bring up the fact we did not take her out for lunch (which we usually do for everyone's birthdays) and we had planned to go out Friday, but stuff came up and the lunch was moved to today. This morning she confronted my other coworker Dave and said she needed to get something off her chest. She was upset that we did not get her anything when she came back from vacation because she would have if the roles had been reversed.

He apologized to her and then later emailed me explaining what she said. Although I think this situation is a little juvenile and if it was me, I wouldn't care about getting gifts (especially if I was on vacation all week), we want to keep the peace in our small office. We bought her a candle and a gift card. I am having trouble finding words to write in the card though. I want to keep it simple without sounding too cold / unsympathetic. I was hoping to get some advice on what to say. Thank you all in advance!

Can you condense the text into three sentences or less?
<bot>: My coworker and I forgot to get a card and gift for my other coworkers birthday. Having trouble wording an apology to put in the card.