How to read tablature? 
Intro Riff - piano/harp -:
    D               G               D               A
xA|---------0-----|---------2-----|---------0-----|-0-------0-|
xE|-----2------ 2 --|-----3------ 3 --|-------------2-|------0----|
xC|---2---2-------|---2---2-------|-----2---------|-----------|
xG|-2-------------|-0-------------|-2-------------|--------2--|

Verse:
     D                          Gbm
When I was small, and Christmas trees were tall,
   G                  D              A
We used to love while others used to play.
D                              Gbm
Don t ask me why, but time has passed us by,
G                  D            A
Someone else moved in from far away.

Chorus:
    G                          D
Now we are tall, and Christmas trees are small,
    Em                        D  D7
And you don t ask the time of day.
    G                        D
But you and I, our love will never die,
    Em          G                 D   A
But guess we ll cry come first of may.

Verse:
    D                        Gbm
The apple tree that grew for you and me,
  G                  D              A
I watched the apples falling one by one.
D                       Gbm
And I recall the moment of them all,
    G                 D                  A
The day I kissed your cheek and you were mine.

Chorus:
    G                          D
Now we are tall, and Christmas trees are small,
    Em                        D  D7
And you don t ask the time of day.
    G                        D
But you and I, our love will never die,
    Em          G                 D   
But guess we ll cry come first of may.

Bridge:
     D                          Gbm
When I was small, and Christmas trees were tall,
G           D           A
Do do do do do do do do do...

Outro - some versions of the song has no chords here - - fading -:
D                              Gbm
Don t ask me why, but time has passed us by,
G                   D            A
Some one else moved in from far away.