February 4 is the 35th day of the year in the Gregorian calendar. In a common year there are 330 days left after this date; in a leap year there are 331. For more on the calendar system that defines this placement, see Gregorian calendar.

Calendar position and leap years

The numbering of February 4 is stable across ordinary and leap years: it remains the 35th calendar day because the extra day in leap years falls later in February. Leap-year rules and their effect on day counts and holidays are discussed in many sources; for a concise explanation of leap years and their calculation see leap years.

Seasonally, February 4 occurs in late winter in the Northern Hemisphere and late summer in the Southern Hemisphere. In common astrological practice this date generally falls under the sign Aquarius, associated with traits often described in popular astrology.

Observances and cultural importance

Several international and national observances can fall on February 4. The most widely recognized is World Cancer Day, an annual campaign by international health organizations to raise awareness and encourage prevention, detection and treatment efforts. Many countries also mark anniversaries, memorials, or national events on this date.

Historically, a wide range of events — political declarations, battles, scientific milestones and notable births and deaths — have occurred on February 4. Those specifics vary by year and region, making the date significant in different local and historical contexts.

Uses and notable distinctions

  • Calendar reference: cited in almanacs, historical timelines and planning schedules.
  • Seasonal marker: useful for agricultural and cultural calendars that track late-winter activities.
  • Commemorations: used by organizations and communities to schedule annual observances.

Because February 4 sits early in the year, it often appears in discussions about early-year statistics, goals and seasonal forecasts. For further reading on calendar conventions and related observances, consult general references and official organizational pages linked above.