1,090 days ago (2 years, 11 months, 24 days ago)

Monday, September 18, 2023

Monday, September 18, 2023 is a Monday. It is day 261 of 2023 (71.5% through the year), ISO week 38, in Q3.

Calendar dial and astronomical representation

Comprehensive Date Metrics for Monday, September 18, 2023

ISO 8601 & Astronomical
Day of Year 261 / 365 71.5% of 2023 passed
Days Left in Year 104 days Remaining until Jan 1, 2024
ISO Week Number Week 38 Quarter Q3
Day Classification Weekday Monday
Roman Numeral Date XVIII.IX.MMXXIII Day.Month.Year
Julian Day Number (JDN) 2,460,205.5 Astronomical continuous count
Unix Epoch Timestamp 1695038400 Seconds since Jan 1, 1970 UTC
Moon Phase & Illumination Waxing Crescent 12% illuminated
Astrological Zodiac Sign Virgo Sun Sign
Calendar Season Summer in the Northern Hemisphere, winter in the Southern Hemisphere Northern hemisphere season
Leap Year Status Common Year (365 days) February has 28 days
Time Elapsed / Countdown 1,090 days ago (2 years, 11 months, 24 days ago) Relative to today

Holidays & Observances

September 18
Observance Constantius (Theban Legion)
Observance Edward Bouverie Pusey (Episcopal Church)
Observance Eustorgius I
Observance Joseph of Cupertino
Observance Juan Macias
Observance Methodius of Olympus
Observance Richardis
Observance September 18 (Eastern Orthodox liturgics)

Date Overview & Context

Calendar Overview

Monday, September 18, 2023 combines practical calendar facts with a wider view of the day: 1981: While posing as an aristocrat, Belgian serial killer Nestor Pirotte murdered an antiques dealer in Brussels, for which crime he was sentenced to death.. Use it to check the date, plan across time zones, and scan the observances and historical markers attached to September 18.

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On This Day in History: September 18

12 Recorded Events

While posing as an aristocrat, Belgian serial killer Nestor Pirotte murdered an antiques dealer in Brussels, for which crime he was sentenced to death.

Nestor Pirotte →

Korean War: The Korean People's Army retreated from the Battle of the Pusan Perimeter after six weeks of fighting, marking the farthest that the KPA would advance in the war.

Korean War →

World War I: The Central Powers' defeat at the Battle of Dobro Pole played a role in the Bulgarian withdrawal from the war and led to the subsequent liberation of Vardar Macedonia.

World War I →

The Blackpool Illuminations (example pictured) in the English seaside town of Blackpool were switched on for the first time.

Blackpool Illuminations →

Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy, setting off a chain reaction of bank failures.

Panic of 1873 →

Nathaniel P. Langford of the Washburn–Langford–Doane Expedition first observed a geyser in the Wyoming Territory erupting at regular intervals, naming it Old Faithful (video featured).

Nathaniel P. Langford →

Notable Memorials & Deaths

In Memoriam

Frequently Asked Questions about Monday, September 18, 2023

What day of the week was or is Monday, September 18, 2023?

Monday, September 18, 2023 falls on a Monday.

How many days ago or from now is Monday, September 18, 2023?

1,090 days ago (2 years, 11 months, 24 days ago). It is day 261 of 2023 with 104 days remaining in the year.

What is the Roman numeral format for Monday, September 18, 2023?

In Roman numerals, Monday, September 18, 2023 is written as XVIII.IX.MMXXIII (Day.Month.Year format).

What was the moon phase and zodiac sign on Monday, September 18, 2023?

The moon phase for this date is Waxing Crescent (approx. 12% illuminated). The astrological sun sign is Virgo.