Article one describes the fravashis of the righteous dead as honoured collectively "at the year-end festival," without naming it. That festival, Frawardigan, is a specific and dateable ten-day observance, and setting it beside comparable festivals elsewhere shows how widespread the underlying impulse is.
Frawardigan falls at the close of the Zoroastrian calendar year, immediately before Nowruz, the new year, and traditionally involves inviting the fravashis of one's ancestors back into the household: homes are cleaned, food set out, and the departed treated as present guests before being ritually sent off as the new year begins. The timing is deliberate. Placing the festival at the year's threshold, a liminal moment in exactly the sense article one's neighbouring entries describe, frames the ancestors' return as part of the world's own turning over, rather than an isolated occasion for individual mourning.
The pattern of a fixed calendrical season when the dead return and are formally welcomed, fed and sent back recurs independently across traditions with no plausible contact with Zoroastrianism: the Chinese Qingming and Ghost Festival, the Japanese Obon, and Mexican Dia de los Muertos all assign the same basic structure, hospitality followed by ritual departure, to a fixed point in the yearly calendar rather than addressing death only at an individual's own funeral. Whether this reflects independent invention around a near-universal need or a deeper pattern of diffusion is not resolved by the comparison alone, and specialists generally favour independent development given how widely separated the traditions are.