Function near_day 

pub fn near_day(days_from_today: i64) -> Option<String>

Name a calendar day next to today in the host’s language — Yesterday, Today, Tomorrow — or None further out, where the caller shows its own date. days_from_today is negative for the past.

use tilo_ui::format::near_day;
assert_eq!(near_day(0).as_deref(), Some("Today"));
assert_eq!(near_day(-1).as_deref(), Some("Yesterday"));
assert_eq!(near_day(2), None);