Thanks for the birthday wishes, I don't look at it as being 40 I look at as being 480 months or 14608 days.
A few statistics for you from the year of my birth (1973). The average house price was £10000, petrol cost 8.5p a litre and the average wage was around £40 a week.
Mobile phones and personal computers didn't exist. If you were really lucky you had a colour TV and a "music centre"
The moon landings were still taking place and the cold war was in full swing.
Edit: For my birthday I got the Haynes Millennium Falcon Workshop Manual (but no Millennium Falcon

), a new computer chair and a day at Goodwood driving a Ferrari 308.