regex101: Month (Alpha) and Day

1st Alternative[Jj]an(uary)?

Character Class[Jj]

Jthe literal J (74₁₀ / 112₈ / 4A₁₆) (case sensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case sensitive)

anthe literal text an (case sensitive)

Group 2(uary)?

?repeats the group contents below at most once:

uarythe literal text uary (case sensitive)

2nd Alternative[Ff]eb(ruary)?

Character Class[Ff]

Fthe literal F (70₁₀ / 106₈ / 46₁₆) (case sensitive)

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

ebthe literal text eb (case sensitive)

Group 3(ruary)?

?repeats the group contents below at most once:

ruarythe literal text ruary (case sensitive)

3rd Alternative[Mm]ar(ch)?

Character Class[Mm]

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

arthe literal text ar (case sensitive)

Group 4(ch)?

?repeats the group contents below at most once:

chthe literal text ch (case sensitive)

4th Alternative[Aa]pr(il)?

Character Class[Aa]

Athe literal A (65₁₀ / 101₈ / 41₁₆) (case sensitive)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

prthe literal text pr (case sensitive)

Group 5(il)?

?repeats the group contents below at most once:

ilthe literal text il (case sensitive)

5th Alternative[Mm]ay

Character Class[Mm]

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

aythe literal text ay (case sensitive)

6th Alternative[Jj]un(e)?

Character Class[Jj]

Jthe literal J (74₁₀ / 112₈ / 4A₁₆) (case sensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case sensitive)

unthe literal text un (case sensitive)

Group 6(e)?

?repeats the group contents below at most once:

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

7th Alternative[Jj]ul(y)?

Character Class[Jj]

Jthe literal J (74₁₀ / 112₈ / 4A₁₆) (case sensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case sensitive)

ulthe literal text ul (case sensitive)

Group 7(y)?

?repeats the group contents below at most once:

ythe literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

8th Alternative[Aa]ug(ust)?

Character Class[Aa]

Athe literal A (65₁₀ / 101₈ / 41₁₆) (case sensitive)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

ugthe literal text ug (case sensitive)

Group 8(ust)?

?repeats the group contents below at most once:

ustthe literal text ust (case sensitive)

9th Alternative[Ss]ep(t(ember)?)?

Character Class[Ss]

epthe literal text ep (case sensitive)

Group 9(t(ember)?)?

10th Alternative[Oo]ct(ober)?

11th Alternative[Nn]ov(ember)?

12th Alternative[Dd]ec(ember)?

Group 14((0[1-9])|([12][0-9])|(3[01])|[1-9]){1}

the literal ↵ (10₁₀ / 12₈ / A₁₆)

Global pattern flags

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

Search reference

Regular Expression

([Jj]an(uary)?|[Ff]eb(ruary)?|[Mm]ar(ch)?|[Aa]pr(il)?|[Mm]ay|[Jj]un(e)?|[Jj]ul(y)?|[Aa]ug(ust)?|[Ss]ep(t(ember)?)?|[Oo]ct(ober)?|[Nn]ov(ember)?|[Dd]ec(ember)?)((0[1-9])|([12][0-9])|(3[01])|[1-9]){1}

New

jul20
october2
December9
nov10
jun49
August09
Jan12
Sep11
Sept12
September14

Regular Expressions 101

Regular Expression

Substitution