What are the most important federal, financial, tax, and cultural dates to mark on your 2027 calendar?
The 2027 US Master Calendar anchors around four core pillars: (1) 11 Federal Holidays under 5 U.S.C. § 6103—highlighted by three weekend-shifted observances on Friday, June 18 (Juneteenth), Monday, July 5 (Independence Day), and Friday, December 24 (Christmas); (2) Mandatory IRS Tax Deadlines led by Tax Day on Thursday, April 15, 2027 and quarterly estimated tax cutoffs (Jan 15, Apr 15, Jun 15, Sep 15); (3) Daylight Saving Time transitions on Sunday, March 14 and Sunday, November 7, 2027; and (4) Major cultural and sporting milestones including Super Bowl LXI on Valentine's Day (Feb 14), Easter (Mar 28), Mother's Day (May 9), Father's Day (Jun 20), and Thanksgiving (Nov 25).
2027 Master Important Dates, Tax Deadlines & Major Events Filter
Filter 2027's essential federal, financial, tax, and cultural milestones in one click
11. Mandatory 2027 IRS Tax Deadlines, Retirement Cutoffs & Healthcare Windows
Missing a statutory Internal Revenue Service (IRS) or Centers for Medicare & Medicaid Services (CMS) deadline triggers automatic failure-to-file penalties (5% per month up to 25% under IRC § 6651) or lifetime Medicare Part B/D late-enrollment surcharges. Under Internal Revenue Code § 7503, if a deadline lands on a weekend or D.C. holiday, it moves to the next business day.
In 2027, April 15 lands cleanly on a Thursday (one day before D.C. Emancipation Day on Friday, April 16). Therefore, Thursday, April 15, 2027 is the strict nationwide deadline for 2026 individual income tax returns (Form 1040), Form 4868 six-month filing extensions, and prior-year 2026 Traditional/Roth IRA and Health Savings Account (HSA) contributions.
- Friday, January 15, 2027: IRS Q4 2026 Estimated Tax Payment (Form 1040-ES) due for self-employed, 1099 contractors, and retirees.
- Monday, February 1, 2027: Deadline for employers to furnish 2026 Form W-2 and Form 1099-NEC to workers (since Jan 31 is Sunday).
- Monday, March 15, 2027: S-Corporation (Form 1120-S) and Partnership (Form 1065) 2026 tax return or extension deadline.
- Thursday, April 15, 2027 (Tax Day): Individual Form 1040, C-Corp Form 1120, 2026 IRA/HSA contribution deadline, and Q1 2027 Estimated Tax due.
- Tuesday, June 15, 2027 & Wednesday, September 15, 2027: Q2 and Q3 2027 IRS Estimated Tax deadlines.
- Friday, October 15, 2027: Extended Form 1040 filing deadline (for filers who submitted Form 4868 by April 15) & First day of Medicare Annual Open Enrollment (Oct 15 – Dec 7, 2027).
- Friday, December 31, 2027: Final day for 2027 401(k)/403(b) employee salary deferrals, Required Minimum Distributions (RMDs), and tax-loss harvesting.
22. Major 2027 Cultural, Family & Religious Observances Across the United States
While federal holidays govern government and banking closures, American retail commerce, family travel, and school calendars revolve around major cultural and religious observances whose dates shift each year on lunar or liturgical calendars.
In 2027, Easter arrives early on Sunday, March 28, 2027, while Passover begins at sundown on Wednesday, April 21, 2027. Islamic observances (which advance roughly 10–11 days earlier each Gregorian year) place Ramadan 2027 from approximately February 8 to March 9, 2027, and Hindu families celebrate Diwali on Friday, October 29, 2027.
- Valentine's Day & Super Bowl LXI: Sunday, February 14, 2027.
- Ramadan 2027: Begins evening of Sunday, February 7 / Monday, February 8, 2027; Eid al-Fitr around Tuesday, March 9, 2027.
- St. Patrick's Day: Wednesday, March 17, 2027.
- Good Friday & Easter Sunday: Friday, March 26 & Sunday, March 28, 2027.
- Passover (Pesach) 2027: Begins sundown Wednesday, April 21 through Thursday, April 29, 2027.
- Mother's Day (Second Sunday in May): Sunday, May 9, 2027.
- Father's Day (Third Sunday in June): Sunday, June 20, 2027.
- Rosh Hashanah & Yom Kippur 2027: Rosh Hashanah Oct 1–3, 2027; Yom Kippur Oct 10–11, 2027.
- Diwali (Festival of Lights): Friday, October 29, 2027.
- Halloween: Sunday, October 31, 2027.
- Hanukkah 2027: Begins sundown Friday, December 24 through Saturday, January 1, 2028 (coinciding directly with Christmas 2027!).
33. Major 2027 US Sports Championships, Civic Elections & Retail Shopping Events
From championship broadcast dates to off-year state and municipal elections, 2027 features a packed national events calendar. On the civic front, Election Day 2027 takes place on Tuesday, November 2, 2027 (including gubernatorial elections in Kentucky, Louisiana, and Mississippi, plus major mayoral and ballot-measure elections nationwide).
For retail shoppers and e-commerce businesses, the five largest promotional windows of 2027 cluster around Presidents' Day Weekend (Feb 13–15), Memorial Day Weekend (May 29–31), Amazon Prime Day (mid-July 2027), Labor Day Weekend (Sep 4–6), and Cyber Week (Black Friday, November 26 through Cyber Monday, November 29, 2027).
- College Football Playoff (CFP) National Championship: Monday, January 25, 2027 (Allegiant Stadium, Las Vegas).
- Super Bowl LXI: Sunday, February 14, 2027 (SoFi Stadium, Los Angeles).
- NCAA March Madness Final Four: April 3 & April 5, 2027 (Ford Field, Detroit).
- The Masters Golf Tournament: April 8–11, 2027 (Augusta National) • Kentucky Derby: Saturday, May 1, 2027.
- Boston Marathon 2027: Monday, April 19, 2027 (Patriots' Day) • Chicago Marathon: Sunday, October 10, 2027 • NYC Marathon: Sunday, November 7, 2027.
- US Election Day 2027: Tuesday, November 2, 2027.
- Black Friday & Cyber Monday 2027: Friday, November 26 & Monday, November 29, 2027.
44. 2027 Astronomical Seasons (Equinoxes & Solstices) & Solar/Lunar Events
Calculated by the US Naval Observatory (USNO), the four astronomical seasons of 2027 mark the exact moments when Earth's axial tilt reaches its equinoxes and solstices.
In addition to the August 12–13 Perseids and December 13–14 Geminids meteor showers, August 2, 2027 features one of the longest Total Solar Eclipses of the 21st century (6 minutes and 23 seconds of totality across Spain, North Africa, and the Middle East), while North American skywatchers will observe a Penumbral Lunar Eclipse on February 20, 2027.
- Vernal Equinox (First Day of Spring 2027): Saturday, March 20, 2027 at 4:25 PM EDT.
- Summer Solstice (First Day of Summer — Longest Day of 2027): Monday, June 21, 2027 at 10:11 AM EDT.
- Autumnal Equinox (First Day of Fall 2027): Thursday, September 23, 2027 at 2:02 AM EDT (Sep 22 at 11:02 PM PDT).
- Winter Solstice (First Day of Winter — Shortest Day of 2027): Tuesday, December 21, 2027 at 9:42 PM EST.
2027 Master Chronological Calendar of Important US Dates, Holidays & Deadlines
| 2027 Date | Event / Holiday / Deadline | Category | Operational / Financial Impact |
|---|---|---|---|
| Fri, Jan 1, 2027 | New Year's Day | Federal Holiday | Banks, USPS & NYSE/NASDAQ Closed |
| Fri, Jan 15, 2027 | Q4 2026 IRS Estimated Tax Due | Tax Deadline | Form 1040-ES Q4 payment cutoff |
| Mon, Jan 18, 2027 | Martin Luther King Jr. Day | Federal Holiday | Banks, USPS & NYSE/NASDAQ Closed |
| Sun, Feb 14, 2027 | Valentine's Day & Super Bowl LXI | Major Event | 6:30 PM ET Kickoff on ABC/ESPN |
| Mon, Feb 15, 2027 | Presidents' Day | Federal Holiday | Banks, USPS & NYSE/NASDAQ Closed |
| Sun, Mar 14, 2027 | Daylight Saving Time Starts | Clock Change | Clocks spring forward 1 hr at 2:00 AM |
| Fri, Mar 26, 2027 | Good Friday (Easter Mar 28) | Market Holiday | NYSE/NASDAQ Closed • Banks Open |
| Thu, Apr 15, 2027 | IRS Tax Day (Form 1040 & Q1 Tax) | Tax Deadline | 2026 Tax Return & IRA/HSA cutoff |
| Sun, May 9, 2027 | Mother's Day | Observance | Peak restaurant & floral weekend |
| Mon, May 31, 2027 | Memorial Day | Federal Holiday | Banks, USPS & NYSE/NASDAQ Closed |
| Tue, Jun 15, 2027 | Q2 2027 IRS Estimated Tax Due | Tax Deadline | Form 1040-ES Q2 payment cutoff |
| Fri, Jun 18, 2027 | Juneteenth Observed (Sat Jun 19) | Federal Holiday | OPM & NYSE Closed Fri Jun 18 |
| Sun, Jun 20, 2027 | Father's Day | Observance | Third Sunday in June |
| Mon, Jul 5, 2027 | Independence Day Observed (Jul 4) | Federal Holiday | Banks, USPS & NYSE Closed Mon Jul 5 |
| Mon, Sep 6, 2027 | Labor Day | Federal Holiday | Banks, USPS & NYSE/NASDAQ Closed |
| Wed, Sep 15, 2027 | Q3 2027 IRS Estimated Tax Due | Tax Deadline | Form 1040-ES Q3 payment cutoff |
| Mon, Oct 11, 2027 | Columbus Day & Canadian Thanksgiving | Federal Holiday | US Banks Closed • NYSE Open • TSX Closed |
| Fri, Oct 15, 2027 | Extended Tax Deadline & Medicare Open | Tax / Healthcare | Form 1040 Extension & Medicare Oct 15–Dec 7 |
| Sun, Nov 7, 2027 | Daylight Saving Time Ends | Clock Change | Clocks fall back 1 hr at 2:00 AM |
| Thu, Nov 11, 2027 | Veterans Day | Federal Holiday | US Banks Closed • NYSE/NASDAQ Open |
| Thu, Nov 25, 2027 | Thanksgiving Day (Black Fri Nov 26) | Federal Holiday | Closed Nov 25 • NYSE 1 PM Close Nov 26 |
| Fri, Dec 24, 2027 | Christmas Observed (Sat Dec 25) | Federal Holiday | OPM & NYSE Closed Fri Dec 24 |
4-Step Annual 2027 Household & Business Calendar Setup
Sync All 11 Observed Federal Holidays & 3 Weekend Shifts First
Mark Friday, June 18 (Juneteenth Observed), Monday, July 5 (Independence Day Observed), and Friday, December 24 (Christmas Observed) across your digital and printed calendars.
Set 7-Day Advance Reminders for the 4 IRS Quarterly Tax Cutoffs
Add calendar alerts for January 15, April 15, June 15, and September 15, 2027 to avoid IRS underpayment penalties.
Lock In Travel & PTO Around Presidents' Day, Memorial Day & Thanksgiving
Book flights and hotels 60–90 days ahead of the nine three-day federal holiday weekends and Super Bowl/Valentine's weekend (Feb 13–15, 2027).
Review Medicare (Oct 15) & Workplace Benefits Open Enrollment in Q4
Use October and November 2027 to audit your 2028 health insurance deductibles, HSA max contributions, and 401(k) deferral limits.
Curated Expert Video Walkthroughs & Wall Street Briefings
Frequently Asked Questions (Verified Statutory Answers)
Q1: When are Mother's Day and Father's Day in 2027?
In 2027, Mother's Day (the second Sunday in May) is on Sunday, May 9, 2027, and Father's Day (the third Sunday in June) is on Sunday, June 20, 2027.
Q2: When is the 2027 IRS tax filing deadline?
The federal income tax filing and payment deadline for 2026 Form 1040 returns is Thursday, April 15, 2027. Taxpayers who file an automatic extension (Form 4868) by April 15 have until Friday, October 15, 2027 to submit their return.
Q3: When is Thanksgiving and Black Friday in 2027?
In 2027, Thanksgiving Day falls on Thursday, November 25, 2027, followed by Black Friday on Friday, November 26, 2027 and Cyber Monday on Monday, November 29, 2027.
Q4: Why do Christmas Eve and Hanukkah overlap in 2027?
In 2027, the first night of Hanukkah begins at sundown on Friday, December 24, 2027 (Christmas Eve—which is also the observed federal holiday for Christmas) and continues through Saturday, January 1, 2028.
