6. Ga2-25 has a bottom which resembles that of Rogo in Gb6-26, and then we also can connect these to Gb1-3, with numerical results which could or could not have been intended to observed:

118 176
Gb6-26 (*1) Ga2-25 (*120) Gb1-3 (*297)
3 * 40 (= 6 * 20) 3 * 59 (= 6 * 29½)
3 * 99

472 - 297 = 175 = 7 * 25.

The proper procedure, however, is probably to count 'from - to', not 'from - to and including'. Therefore a better structure is to put Gb6-26 at the end:

176 175
Ga2-24 Ga2-25 (*120) Gb1-3 (*297) Gb6-26 (*473)
354 = 12 * 29½
Gb6-27 Gb6-28 Gb7-1 Gb7-2 Gb7-3 Gb7-4 (*479)
6 (= 360 - 354)

Though there is at least one more of this type we ought to take into consideration:

176 72
Ga2-24 Ga2-25 (*120) Gb1-3 (*297) Gb3-15 (*370)
250 = 177 + 73

It seems to say summer is not stretching beyond Rogo in Gb3-15. Antares (at day number 186 + 64 = 250) is no longer a proper indicator of where summer is beginning. Summer on Easter Island can be regarded as arriving with Naos and leaving with Altair, i.e. stretching for 301 - 122 = 179 (= 266 - 87) days:

South of the equator North of the equator
autumn equinox 266 spring equinox 80 (89)
winter solstice 358 = 266 +172 - 80 summer solstice 172 (181)
Sun returns (Naos) 23 (122) = 87 - 64 Sun leaves (Naos) 202 (211)
spring equinox 87 = 358 + (266 - 172) - 365 autumn equinox 266 (275)
summer solstice 177 = 87 + (356 - 266) = 6 * 29½ winter solstice 356 (365)
Sun leaves (Altair) 202 (301) = 23 + 179 Sun returns (Altair) 16 (25)

The duration of winter is 365 - 179 = 186 days - longer than north of the equator. Or we could say that 'summer' north of the equator is beginning with Ga2-26, at least it was so a long time ago when Cancer rose heliacally around winter solstice:

176 72 102 12
Gb1-3 (233) Gb3-15 (306) Gb6-26 (409) Gb7-11 (422)
250 116
366
Gb6-26 Gb6-27 Gb6-28 Gb7-1 Gb7-2 Gb7-3 Gb7-4
353 354 355 356 357 358 359
Gb7-5 (416) Gb7-6 Gb7-7 Gb7-8 Gb7-9 (420) Gb7-10 Gb7-11
360 361 362 363 364 365 366

If we persist stating that spring equinox on Easter Island coincides with glyph number 122 (viri in Ga5-11), then 306 (Gb3-15) - 122 (Ga5-11) = 184 days could mean summer stretches for 5 days beyond autumn equinox:

175
Ga5-11 (*186) Gb3-7 Gb3-8 Gb3-9 Gb3-10 (*365)
179
Gb3-11 Gb3-12 Gb3-13 Gb3-14 Gb3-15 (306)