[Verse 1]
Once upon a time, not so very long ago
There was a little trouble going on
The Diesels made the steamies pretty mad
And none of them could even get along
There they go, heading for the Steamworks
Honking horns, listen to the rolling thunder

[Chorus]
Day of the Diesels
'Arry, Bert, Paxton, Diesel and Den
Day of the Diesels
Norman, Dart and Diesel 10

[Verse 2]
Percy thought he didn't have a friend in the world
How very, very wrong could he be
With a friend like Thomas rolling by his side
He couldn't be in better company
There they go, heading for the Steamworks (headin' for the Steamworks)
Whistles blow, listen to the rolling thunder

[Chorus]
Day of the Diesels (yeah, yeah)
'Arry, Bert, Paxton, Diesel and Den
Day of the Diesels (yeah, yeah, yeah)
Norman, Dart and Diesel 10
Day of the Diesels
'Arry, Bert, Paxton, Diesel and Den
Day of the Diesels
Norman, Dart and Diesel 10
[Bridge]
Thomas and Percy
Gordon and Henry
Fiery Flynn
He roars to the rescue
James and Edward
Toby and Emily
Don't forget Belle
Big, brave and bright blue
Rolling thunder
Rolling thunder

[Verse 3]
With the Dieselworks all cinders and ashes
There's only one thing to do
Put aside your worries and just pull together
Is the only way to get through
There they go, building it together (all together)
Dieselworks rising from the rolling thunder

[Chorus]
Day of the Diesels (yeah, yeah, yeah)
'Arry, Bert, Paxton, Diesel and Den
Day of the Diesels (woo-oo-oo)
Norman, Dart and Diesel 10
Day of the Diesels
'Arry and Bert, Paxton, Diesel and Den
Day of the Diesels (yeah-ah-ah)
Norman, Dart and Diesel 10
Day of the Diesels