In Barthel 2 a summary is given over the months on Easter Island (according to the structure of a modern calendar). I have adapted the table somewhat. Red means the 6 months when sun is 'present':

1st quarter

2nd quarter

3rd quarter

4th quarter

He Anakena (July)

Tagaroa uri (October)

Tua haro (January)

Vaitu nui (April)

Same as the previous month.

Cleaning up of the fields. Fishing is no longer taboo. Festival of thanksgiving (hakakio) and presents of fowl.

Fishing. Because of the strong sun very little planting is done.

Planting of sweet potatoes.

Hora iti (August)

Ko Ruti (November)

Tehetu'upú (February)

Vaitu potu (May)

Planting of plants growing above the ground (i.e., bananas, sugarcane, and all types of trees). Good time to fish for eel along the shore.

Cleaning of the banana plantations, but only in the morning since the sun becomes too hot later in the day. Problems with drought. Good month for fishing and the construction of houses (because of the long days).

Like the previous month. Some sweet potatoes are planted where there are a lot of stones (pu).

Beginning of the cold season. No more planting. Fishing is taboo, except for some fishing along the beach. Harvesting of paper mulberry trees (mahute). Making of tapa capes (nua).

Hora nui (September)

Ko Koró (December)

Tarahao (March)

He Maro (June)

Planting of plants growing below the ground (i.e., sweet potatoes, yams, and taro). A fine spring month.

Because of the increasing heat, work ceases in the fields. Time for fishing, recreation, and festivities. The new houses are occupied (reason for the festivities). Like the previous month, a good time for surfing (ngaru) on the beach of Hangaroa O Tai.

Sweet potatoes are planted in the morning; fishing is done in the afternoon.

Because of the cold weather, nothing grows (tupu meme), and there is hardly any work done in the fields. Hens grow an abundance of feathers, which are used for the festivities. The time of the great festivities begins, also for the father-in-law (te ngongoro mo te hungavai). There is much singing (riu).

The spelling of the names of the months are according to Vanaga.