A pair, a twin, it's double,
No squad without a quad,
And two round figures, zero,
It was 2004.

After January, it's four steps away,
Can replace can in the tag, 'can I?'
Quick question; can February March?
No, but April May.

It's only but a score plus one unit,
And it's the jumbled numeral of a dozen,
The 3rd multiple of 7 and the 7th multiple of 3,
21 is not a prime number but it is my lucky number.

And have you ever wondered why Friday symbolizes fun,
Or why you can't help but love Fridays,
Take off your thinking cap, the puzzle's already solved,
Friday, 21st May, 2004 was the morning I came.