Two of the stamps on one of the outside envelopes for an Ebay purchase from England feature The Twelve Days of Christmas (song).

Issued Nov. 23, 1977
Perf. 15×14 | One center phosphor band (7p.) | Design D. Gentleman
1046 525 7p. Slate, grey, bright yellow-green, new blue, rose-red and gold | “Eight Maids-a-milking, Seven Swans-a-swimming”
1047 526 7p. Slate, grey, bright yellow-green, new blue, rose-red and gold| “Ten pipers piping, Nine Drummers drumming”
[Source: 1997 Stanley Gibbons Stamp Catalogue, Part 1 British Commonwealth, Vol. 1]
The lyrics given here are from Frederic Austin’s 1909 publication that established the current form of the carol.
The first three verses run, in full, as follows:
On the first day of Christmas my true love sent to me
A partridge in a pear tree
On the second day of Christmas my true love sent to me
Two turtle doves,
And a partridge in a pear tree.
On the third day of Christmas my true love sent to me
Three French hens,
Two turtle doves,
And a partridge in a pear tree.
Subsequent verses follow the same pattern.
Each verse deals with the next day of Christmastide, adding one new gift and then repeating all the earlier gifts, so that each verse is one line longer than its predecessor:
— four calling birds
— five gold rings
— six geese a-laying
— seven swans a-swimming
— eight maids a-milking
— nine ladies dancing
— ten lords a-leaping
— eleven pipers piping
— twelve drummers drumming
