Describe an important thing that you forgot to do

Describe an important thing that you forgot to do
You should say:
- What you forgot?
- When this happened? Where it happened?
- What problems/consequences it caused?
- And say why it was important to you.

Selection: A job interview or a final project/assignment at school.
A; A job interview that completely slipped my mind (forgot), junior marketing role, graduate position.
B: The first year when I graduated from high school/ university, applied for a number of positions, a potential employer called (make up a name of the company- Apple) and asked if I’m available for a face to face interview, booked in an interview and their office is located in Hanoi – which is quite far from my hometown – Haiphong. 
C: I forgot to switch on the alarm and my appointment was early in the morning, I missed out on the golden opportunity, called and apologized, unfortunately I couldn’t get a second chance, I felt greatly disappointed about myself but I’ve learnt a valuable lesson. 
D: First job interview, researched thoroughly on the company background and information, my parents were looking forward to receive the good news from me.