| 100% | OMER | 4 | Seven-week period in Judaism that begins during Passover |
| 37% | SPACEAGE | 8 | Time period that began with Sputnik in 1957 |
| 36% | LENT | 4 | Christian observance period that will begin on March 6 in 2019 |
| 36% | INTERNETAGE | 11 | *Period of connectivity that began in the 1990s |
| 35% | OMER | 4 | 49-day period in Judaism |
| 34% | ERA | 3 | Rock ___ (period of music that began in the 1950s) |
| 32% | LENT | 4 | Season that begins next week |
| 32% | YSER | 4 | River that begins in Nord |
| 32% | ACTS | 4 | Book that begins in Jerusalem |
| 32% | FALL | 4 | Season that begins in September |
| 32% | EXODUS | 6 | Book that begins in Egypt |
| 32% | FRENCHREVOLUTION | 16 | Event that began in 1789 |
| 32% | OLYMPIC | 7 | Games that began in Athens |
| 32% | OBAMA | 5 | With 23-Across, period that began in January 2009 |
| 32% | DST | 3 | Observance that begins in March: Abbr. |
| 32% | SARANAC | 7 | River that begins in the Adirondacks |
| 32% | AIDA | 4 | Verdi opera that begins in Memphis |
| 32% | ERIECANAL | 9 | Construction project that began in Rome |
| 32% | AOL | 3 | Gmail alternative that began in 1993 |
| 32% | KARATE | 6 | Martial art that began in Okinawa |
| 32% | SHIVA | 5 | Mourning period, in Judaism |
| 32% | DAYS | 4 | Seven in a week |
| 31% | OPEN | 4 | US ___ (tennis event that began this week) |
| 31% | LEO | 3 | Astrological sign that begins in late July |
| 31% | YWCA | 4 | Welfare movement that began in 1855 (abbr) |
| 31% | CASSINI | 7 | Spacecraft that began orbiting Saturn in 2004 |
| 31% | ZEN | 3 | Branch of Buddhism that began in China |
| 31% | GETSMART | 8 | TV spy comedy that began in 1965 |
| 31% | OLYMPICS | 8 | International games that began in Ancient Greece |
| 31% | BSA | 3 | Org. that began welcoming girls in 2019 |