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2018 Quarterly Calendar

2018 split into four 3-month calendars. Q1 starts on Monday, January 1, 2018 and has 90 days; Q2 is the busiest quarter with 64 US working days, and Q4 the lightest with 62. Each quarter lists its dates, working days, ISO weeks and federal holidays.

Q1 2018January – March

90 days · 62 working days · W1–W13

January 201821 work days
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February 201819 work days
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March 201822 work days
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Q2 2018April – June

91 days · 64 working days · W13–W26

April 201821 work days
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May 201822 work days
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June 201821 work days
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Q3 2018July – September

92 days · 63 working days · W26–W39

July 201821 work days
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August 201823 work days
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September 201819 work days
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Q4 2018October – December

92 days · 62 working days · W40–W1 (2019)

October 201822 work days
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November 201820 work days
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December 201820 work days
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2018 Quarters at a Glance

QuarterDatesDaysWorking daysISO weeksFederal holidays
Q1Mon, Jan 1 – Sat, Mar 319062W1–W13New Year's Day, MLK Day, Presidents' Day
Q2Sun, Apr 1 – Sat, Jun 309164W13–W26Memorial Day
Q3Sun, Jul 1 – Sun, Sep 309263W26–W39Independence Day, Labor Day
Q4Mon, Oct 1 – Mon, Dec 319262W40–W1 (2019)Columbus Day, Veterans Day, Thanksgiving, Christmas Day

2018 Quarterly Calendar FAQ

When does each quarter of 2018 start and end?

Q1 runs from Monday, January 1, 2018 to Saturday, March 31, 2018 (90 days); Q2 runs from Sunday, April 1, 2018 to Saturday, June 30, 2018 (91 days); Q3 runs from Sunday, July 1, 2018 to Sunday, September 30, 2018 (92 days); Q4 runs from Monday, October 1, 2018 to Monday, December 31, 2018 (92 days).

How many working days are in each quarter of 2018?

Q1 has 62, Q2 has 64, Q3 has 63, Q4 has 62 US working days (Monday to Friday minus federal days off). Q2 has the most and Q4 the fewest.

Which ISO weeks fall in each 2018 quarter?

Q1 runs from W1 to W13, Q2 runs from W13 to W26, Q3 runs from W26 to W39, Q4 runs from W40 to W1 (2019). Weeks that start in one quarter and end in the next appear in both.

Are these calendar quarters or fiscal quarters?

They are calendar quarters. The US federal fiscal year starts on October 1, so October to December 2018 (calendar Q4) is Q1 of federal fiscal year 2019.

Make Your Own 2018 Quarterly Planner

Open 2018 in the builder, add deadlines and events to each month, and export a PDF.

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