Page "Vorkosigan Saga" Paragraph 10

Bujold pays token attention to the variations in measurable time units from planet to planet, positing an earth-based “ standard year ” which holds through the entire Nexus.

Moreover, days are calculated in terms of a “ standard hour ” no matter how long they are, so that Barrayar has a day 26. 7 hours long.

Bujold herself has commented that her posited system is neither technologically nor economically feasible, but is rather a convenience for storytelling.