The Australians celebrate Christmas in December, in summer. Likewise it is possible, yes quite probable (I believe), that on Easter Island new year was celebrated in summer, at the same time as new year was celebrated in Hawaii (though north of the equator it was winter).

The new year suggested in the glyphs following Aa6-14 (Hanga Takaure) agree in general meaning with these glyphs arriving later in the same glyph line:

Aa6-64 Aa6-65 Aa6-66 Aa6-67 (525) Aa6-68 Aa6-69 Aa6-70
 
Aa6-71 Aa6-72 Aa6-73 Aa6-74 Aa6-75 Aa6-76

Aa6-67 has been commented at vaha mea:

 

... At Ab4-68 Metoro saw haha, i.e. a mouth:

Haha

1. Mouth (oral cavity, as opposed to gutu, lips). 2. To carry piggy-back. He haha te poki i toona matu'a, the child took his father on his back. Ka haha mai, get onto my back (so I may carry you). Vanaga.

1. To grope, to feel one's way; po haha, darkness, obscure. 2. Mouth, chops, door, entrance, window; haha pipi, small mouth; haha pipiro, foul breath; ohio haha, bit of bridle; tiaki haha, porter, doorkeeper. Churchill.

Together with the following mea we are very close to vaha mea, as if there was a word play (haha mea) together with a glyph play:

Aa6-67

Ab4-68--69

vaha mea

haha - mea

In Aa6-67 the (sun) fish is designed as if being swallowed by a hoea glyph. At summer solstice the opposite of mea occurs - the dark season will begin.

Ab4-68--69, half a cycle later, has mea at right. Side b on Tahua probably refers to winter. In winter there will come a time when sun (mea) returns ...

To which should be added that the rising fish in Aa6-73 presumably represents the 'new fish' (sun beyond midsummer). There are two sun cycles in a year.