| A red-letter day is important, like the feast days marked in red in church calendars. |
| Upon receiving his award, he said the day would go down in his diary as a red-letter day. |
| Yesterday was a red-letter day for the Credit Union in Portlaoise as they opened the doors of their new offices for business. |
| It must have seemed like a red-letter day for council employees as they received their new pay levels. |
| Today, as I said, is a blue-ribbon day, a red-letter day, or whatever one wants to call it. |
| At the present time, sighting a peregrine in East Anglia provides a red-letter day. |
