There's no better command...
/summon Chicken ~ ~ ~ {Passengers:[{id:Zombie,IsBaby:1}]}
Set the time to dawn:
/time set 0
Note:
0 for dawn, 6000 for midday, 12000 for dusk and 18000 for night.
Make sure that if you die you don't lose your inventory with:
/gamerule keepInventory true
/cannon
...launches TNT where you are pointing.
/tp ~ ~ ~
^^ This returns your current location
/tp x y z
(Where x y and z are values) will take you somewhere.
/give @s command_block