Tirasday, the 5th of Therendor (March), celebrates the birth of Tira Miron. Given its proximity to the beginning of spring, the holiday has taken on attributes of a sowing festival, a time to work rather than relax. After dusk sets, gifts are exchanged, and the celebration begins.
Source: Cultures of Thrane
It’s a happy coincidence that the 5th of Therendor, the beginning of the planting season, is also the date that Tira Miron was born. It is common for the faithful to exchange gifts with each other on Tira’s Day, showing their affection for each other and spreading joy. It’s also a popular date for weddings to be held in Thrane.
Source: Sarhain's Guide to the Silver Flame
This holiday celebrates the birth of Tira Miron, the Voice of the Flame.
Source: Eberron Campaign Guide
This holiday celebrates both the start of the planting season and the birth of Tira Miron, Voice of the Silver Flame and the woman who brought mortals and the divine together. This is a day of work, but also of joyous celebration in the evenings. It is a time for giving gifts, and one of the most popular marriage dates.
Source: Faiths of Eberron