Regular Expressions 101

Explanation

Pro

Non-Capturing Group(?:(\d{1,2})(?:th|nd|rd).* ([a-z]{3})[a-z]*|([a-z]{3})[a-z]* (\d{1,2}))

1st Alternative(\d{1,2})(?:th|nd|rd).* ([a-z]{3})[a-z]*

Group 1(\d{1,2})

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

Non-Capturing Group(?:th|nd|rd)

1st Alternativeth

ththe literal text th (case insensitive)

2nd Alternativend

ndthe literal text nd (case insensitive)

3rd Alternativerd

rdthe literal text rd (case insensitive)

.*any Unicode character (except for line terminators), repeated any number of times

the literal (32₁₀ / 40₈ / 20₁₆)

Group 2([a-z]{3})

Character Class[a-z]{3}

{3}matches exactly 3 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

Character Class[a-z]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

2nd Alternative([a-z]{3})[a-z]* (\d{1,2})

Group 3([a-z]{3})

Character Class[a-z]{3}

{3}matches exactly 3 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

Character Class[a-z]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

Group 4(\d{1,2})

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*a Unicode whitespace character, repeated any number of times

Group 5(\d{4})

\d{4}a Unicode decimal digit, repeated exactly 4 times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?:(\d{1,2})(?:th|nd|rd).* ([a-z]{3})[a-z]*|([a-z]{3})[a-z]* (\d{1,2})),\s*(\d{4})

this amendment of lease, made and entered as of the  10th day of august, 2016,   by and between john doe and jane smith

this agreement, made and entered as of May 1, 2016, between john doe and jane smith