You might have this confused with Majora's Mask, there is no postman in Hyrule Field.
Whoever answered above is an idiot and has clearly never played Legend of Zelda OoT. There is a postman in Hyrule Field. He wants the Bunny-mask, but I have forgotten how you run up to him since he's so freaking fast....
But if you're talking about when to give him the Bunny-mask it is at nightfall/night somewhere around Lon-Lon Ranch to the left of the gate.
In which Zelda game? In oot he can be seen running about hyrule field. In twilight princess he will find you, or be in one of many set locations. Go into the stables in orden for example, he be at the very back. Or behind the throne in Zoroastrian domain. I do not know for MM.
After you try to communicate with Zelda herself and sneak past many guards, you will be leaving Hyrule. When you are doing so, you will be on Hyrule field when you hear a horse noise. You will turn around to notice Ganondorf kidnapping Zelda on his horse. While doing so, Zelda throws her ocarina into the moat around Hyrule village. When the scene is over, go to the water (the moat) and dive to get the ocarina.
Starting from Hyrule field, ride epona to the southernmost exit and jump over the fence. Voila!
I think you're talking about Peahats.
Depends on the game. The legend of Zelda - Quite common and found in most places in the overworld Ocarina of Time - In the Desert Twilight Princess - In Hyrule field.
you don't have tounlock it its just in hyrule field in the ocarina of time if that's the game you are talking about, it is accessible in a adult and child form
You get the first ocarina from Saria. She gives it to you after you beat the Deku Tree dungeon and go to Hyrule Field. You get the Ocarina of Time from Princess Zelda once you get the 3 spiritual stones and open the Temple of Time. She will drop it in the moat and then you you have to jump in and grab it.
You dont
it is right outside hyrule castle (P.S. don't get killed by the monsters outside in the hyrule field) you can also find hyrule field by going through the story line of the game and plus it does not matter where hyrule field is anyway in the game at all in less you are getting all the hidden skills
The guy in the bunny mask is running around in Hyrule Field, you have to follow him and wait for him to stop running if you are trying to sell him the mask. If he has already bought the mask from you, there is no catching him!
The Hylian field is the big field that you first see when you come out of the Kokiri forest. In it's centre is Lon Lon Ranch, and from the field you can go to Lake Hylia, Gerudo Valley, Hyrule market town, Kakariko Village, Lon Lon Ranch, Kokiri Forest, or Zora's River.
There is a man in hyrule field who is running. Follow him, as young link after you have gotten all of the spiritual stonesalk to him, until he stops. Talk to him with the mask on and he will buy it. Try to have space in your wallet because he will fill it up.
The gorons find it for you and marks a dot on your map search near Hyrule field