Kevda Trij
What it is
Kevda Trij falls on Bhadarva Sud Trij and is named for the kevdo, the screwpine whose heavy, sweet scent belongs to the closing weeks of the monsoon. Across Gujarat the day is kept by women as a vrat of Gauri, in which the kevda flower is central. The Pushtimarg calendar carries the day for where it sits in the season, not because the sampradaya keeps that vrat.
In the haveli it is marked the way a season is always marked here, by what is offered. These are the weeks when kevdo is at its best, and it takes its place among the flowers set before Shree Thakorji, while kevda attar has long had its own place in His seva.
Why we observe it
Pushtimarg is a path of ananya ashray: a Vaishnav's refuge is in Shri Krishna alone, and every seva and every prayer goes to Shrinathji. So the vrat of this day is not this marg's, and nothing is borrowed from it. What is taken is the flower.
The rule the havelis have kept for five centuries is that whatever the season has at its finest is offered to Prabhu first, and what Bhadarva has at its finest is a fragrance. Held in that bhav, Kevda Trij is simply the day the monsoon's own scent is laid before Shree Thakorji, which is what a Vaishnav does with anything beautiful that comes to hand.