Straight answers, with the source

Establishments with 11 or more employees that aren't in a partially exempt industry. If you're covered, you must post even if you had no recordable injuries.

From February 1 through April 30 each year. After that you must retain it (and the underlying 300 Log and 301 forms) for five years.

Yes. A company executive must certify that they examined the OSHA 300 Log and that the 300A summary is correct and complete.

No. The summary must stay posted continuously from February 1 through April 30. You can remove it on or after May 1.

Retain it with the underlying 300 Log and 301 forms for five years; OSHA can request them during that period.

Covered establishments must electronically submit the prior year's injury and illness data through the Injury Tracking Application by March 2.

Generally, establishments with 100+ employees in certain high-hazard industries (300/300A/301) and those with 20–249 employees in designated industries (300A). Check OSHA's industry list for your NAICS code.

Five years following the end of the calendar year the records cover. You must also update the stored 300 Log if you learn of a recordable case you missed.

Within seven calendar days of receiving information that a recordable work-related injury or illness occurred.

OSHA is developing a dedicated heat-injury and illness standard, but until it's final, heat hazards are enforced under the General Duty Clause and a National Emphasis Program on heat.

Water, rest, and shade — give workers cool water, frequent breaks, and a shaded or cooled area, and acclimatize them to the heat gradually.

It runs August 10–16, 2026. Any organization can participate and download a free certificate of recognition from OSHA.

A voluntary event where employers pause work to talk directly with workers about a specific hazard — here, preventing falls in construction.

Private employers with 100+ employees, and federal contractors with 50+ employees that meet the contract-dollar threshold.

The EEOC sets the deadline each year when it opens the data collection — often in spring. Always confirm the current-year date on the EEOC site.

The IRS provides an automatic 30-day extension from January 31, putting the furnishing deadline in early March each year.

Applicable Large Employers — those with 50+ full-time and full-time-equivalent employees — must furnish a 1095-C to each full-time employee.

March 31 for electronic filing of Forms 1094-C and 1095-C with the IRS. Paper filing, where still permitted, is due at the end of February.

Yes for most employers — anyone filing 10 or more information returns in aggregate must file electronically through the IRS AIR system.

By January 31. The same deadline applies to filing Copy A with the Social Security Administration.

For calendar-year plans, July 31 — the last day of the seventh month after the plan year ends. Filing Form 5558 by then extends the deadline 2½ months to October 15.

Yes. File Form 5558 on or before the original due date for an automatic 2½-month extension.

Employers with 50 or more employees, plus public agencies and schools, must post the DOL FMLA general notice where it's visible to employees and applicants.

Before October 15 each year — ahead of the Medicare annual enrollment period — to all Medicare-eligible individuals covered by your prescription drug plan.

Most HR teams begin in late summer or early fall — around September — so plan decisions, notices, and communications are ready before a fall enrollment window and a January 1 effective date.

September 26 each year.

The Wednesday of the last full week of April — April 22 in 2026.

The Uniformed Services Employment and Reemployment Rights Act — it protects service members' civilian jobs, requiring reemployment after service and prohibiting discrimination based on military obligations.

The first Friday in March — March 6 in 2026.

It symbolizes how far into the year women must work to earn what men earned in the prior year — a marker of the gender wage gap, observed since 1996.

September 9 every year. It was founded by CompliCalendar in 2026 as a free annual reminder for employers and HR teams to run a quick compliance self-check.

Anyone. It's a free, open observance — there's nothing to buy and no registration. Employers, HR teams, and safety managers are the natural participants.

Run a short self-audit: confirm workplace postings are current, deadlines are calendared, required training is up to date, and key policies have been reviewed in the last year. CompliCalendar publishes a free checklist to follow.

CompliCalendar founded it in 2026. We disclose that openly — it's our observance, created to encourage a simple yearly habit, not a government or industry mandate.

May 6 through May 12, ending on Florence Nightingale's birthday.

The entire month of June, led by the National Safety Council.

It marks the anniversary of OSHA's creation in 1971 and the day the Occupational Safety and Health Act took effect.

The International Labour Organization (ILO), which has observed it on April 28 since 2003.

It's observed in May — May 17–23 in 2026 — and is presented by the American College of Emergency Physicians.

Yes. Operators must be trained, evaluated, and certified, with re-evaluation at least every three years or after an incident or unsafe operation.

The week containing October 9, marking the Great Chicago Fire — October 4–10 in 2026.

National Disability Employment Awareness Month — observed each October by the U.S. Department of Labor to celebrate the contributions of workers with disabilities and promote inclusive employment.

The entire month of May, first established by Mental Health America in 1949.

There's no single federal standard, but OSHA enforces workplace violence hazards under the General Duty Clause, and some states (and industries like healthcare) have specific requirements.

The entire month of August.

The first Wednesday in November — November 4 in 2026.

October 10 each year, recognized by the World Health Organization.

July 15 every year.

March 6 — the anniversary of the first Oreo sale in 1912.

February 9 every year.

Cater a pizza lunch with dietary options, run a toppings vote, or pair it with a team welcome — it's one of the easiest morale boosts on the calendar.

The first Friday in June — in 2026 that's June 5.

The Salvation Army established it in 1938 to honor the volunteers who served donuts to soldiers in World War I.

September 29 in the U.S. International Coffee Day is two days later, on October 1.

It's a play on the franchise's line 'May the Force be with you' — 'May the Fourth be with you.'

October 4 — though some years it's also celebrated on the first Taco Tuesday of October.

The third Sunday in July — July 19 in 2026. The whole month is National Ice Cream Month.

The Friday after Father's Day — June 26 in 2026.

Check lease and insurance rules, plan for allergies and fears, require vaccinations and leashes, and designate dog-free areas.

October 28 in the U.S.

July 1 every year.

January 24 every year.

The third Friday in December — December 18 in 2026.