| INAUGURAL | Marking the start of office |
| OPUS | Knocked back drink after start of office work |
| ENID | Forename of illustrator "Marco" Marx who designed moquette seating fabric for London Underground trains in the 1930s and stamps marking the start of Queen Elizabeth II's reign (4) |
| IMBOLC | Gaelic festival marking the start of spring (6) |
| POST | A stake or upright marking the start or finish of a horse race; or, a collection or delivery of mail (4) |
| USHERINGIN | Marking the start of, as a 133-Across |
| RODIN | Celebrated at a current exhibition at the Grand Palais marking the centenary of his death, the founding father of modern sculpture whose works include The Burghers of Calais and The Thinker (5) |
| HOYS | Featuring the dramatic puissance competition, the abbreviated name of an annual event marking the end of the equestrian season (1,1,1,1) |
| RENAISSANCE | The period of European history marking the waning of the Middle Ages (11) |
| EID | Islamic festival marking the sacrifice made by Abraham and the end of the annual pilgrimage to Mecca |
| MIHRAB | A niche in the wall of a mosque marking the direction of Mecca (6) |
| THUMB | Series of notches on the outer edge of a book's pages marking the various sections; ... index |
| ADVENT | German Lutherans began the practice of marking the progression to Christmas with the ... calendar |
| HANUKKAH | Jewish holiday marking the rededication of the Temple of Jerusalem, 165 BC (8) |
| YEAR | With typically 12 full moons, time between successive spring or autumn equinoxes marking the cycle of the seasons according to the Gregorian calendar (4) |
| TRAIL | Beaten or blazed path in the wilds; or, a series of signs or clues such as footprints, spoor or line-shaped vaporous clouds marking the passage of a person, quarry or aircraft (5) |
| SAMHAIN | Gaelic festival marking the end of the harvest season and beginning of winter |
| TORII | The gateway marking the entrance to the sacred precincts of a Shinto shrine is called what? |
| IDES | Name given to each of the mid-month days in the ancient Roman calendar marking the full moon (4) |
| CADENCE | Progression of chords marking the end of a piece of music (7) |
