| 100% | EQUINOX | 7 | Astronomical event that marks the beginning of spring or autumn |
| 75% | EQUINOX | 7 | Event that marks the start of spring or autumn |
| 64% | EQUINOX | 7 | Astronomical event that marks the start of autumn |
| 55% | SHAM | 4 | ___ Ennessim: Egypt's national holiday that marks the beginning of spring |
| 47% | CUSP | 4 | Point that marks the beginning of a change |
| 46% | EROICA | 6 | Symphony that marked the beginning of Beethoven's "middle period" |
| 44% | TET | 3 | Holiday that marks the arrival of spring |
| 43% | TET | 3 | Vietnamese holiday that marks the arrival of spring |
| 41% | TET | 3 | Vietnamese New Year that marks the arrival of spring |
| 40% | USHERIN | 7 | Mark the beginning of |
| 40% | INAUGURAL | 9 | Marking the beginning of |
| 38% | SOLSTICE | 8 | Astronomical event that marks summer and winter |
| 38% | BUZZER | 6 | Loud noise that marks the end of a quarter or a game in basketball |
| 37% | PLACEASHESONONESFARAD | 21 | Mark the beginning of Lent in a shocking way? |
| 37% | USHERIN | 7 | Mark the beginning of, as a new era (2 wds.) |
| 37% | CARNEVALE | 9 | Festival marking the beginning of Lent in Italy |
| 35% | POT | 3 | Word that may precede the beginning of 17-, 26-, 42- or 56-Across |
| 35% | LUNARECLIPSES | 13 | Astronomical events that occur twice or more a year |
| 35% | BLACK | 5 | ___ Friday, day following Thanksgiving which marks the beginning of Christmas shopping season |
| 35% | EQUINOX | 7 | Astronomical event happens in spring, autumn |
| 35% | GENESIS | 7 | The beginning or birth of something |
| 34% | EID | 3 | Holiday that marks the end of Ramadan |
| 34% | DOUBLEBILL | 10 | Event with two headliners, or a description of a restaurant check that includes any of the answers to the starred clues? |
| 34% | HTTP | 4 | Letters at the beginning of a URL or web address |
| 34% | MTDANA | 6 | Peak that marks the eastern boundary of Yosemite Natl. Park |
| 34% | BOUNDARY | 8 | Line that marks the limits of an area |
| 34% | AUGUST | 6 | Month that marks the start of Virgo season |
| 34% | EROICA | 6 | Work that marked the start of musical Romanticism |
| 33% | DAS | 3 | The beginning of Lothar-Günther Buchheim's 1973 novel that follows U-96 |
| 33% | SUNSET | 6 | Event marking the end of the day |