Knowledge Base

• Date & Time Patterns

  • Standards
  • Time
  • Date
  • Miscellaneous

• Regex Patterns

• Dimensions

• Temperature Conversions

  • Fahrenheit to Celsius
  • Celsius to Fahrenheit

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Date & Time Patterns

from datetime import datetime

dt = datetime.now()

print(dt.strftime('%a'))

Standards

Example	Pattern Name
5/29/1994 12:00	Short
May 29, 1994 at 12:00:00	Medium
May 29, 1994 at 12:00:00 MDT	Long
Mon, 29 May 1994 12:00:00 -0600	RFC 2822
1994-05-29T12:00:00-0600	ISO 8601

Time

Pattern	Example	Description
F	0-9	Most significant digit of fractional seconds. Nothing is displayed if zero
f	0-9	Most significant digit of fractional seconds
ff	0-99	Two most significant digit of fractional seconds
fff	0-999	Three most significant digit of fractional seconds
ffff	0-9999	Four most significant digit of fractional seconds
fffff	0-99999	Five most significant digit of fractional seconds
ffffff	0-999999	Six most significant digit of fractional seconds
fffffff	0-9999999	Seven most significant digit of fractional seconds
s	0-59	Seconds
ss	00-59	Seconds with a leading zero
m	0-59	Minutes
mm	00-59	Minutes with a leading zero
h	1-12	12-hour clock hour
hh	01-12	12-hour clock hour with leading zero
H	0-24	24-hour clock hour
hh	00-24	24-hour clock hour with leading zero
t	A,P	Abbreviated AM/PM
tt	AM,PM	AM/PM

Date

Pattern	Example	Description
d	1-31	Day of the month as a number
dd	01-31	Day of the month as a number with a loading zero
ddd	Mon, Tues, Wed etc.	Abbreviated name of the day of the week
dddd	Monday, Tuesday, Wednesday, etc.	Full name of the day of the week
M	1-12	Month number
MM	01-12	Month number with leading zero
MMM	Jan, Feb, Mar, etc.	Abbreviated month name
MMMM	January, February, March, etc.	Full month name
y	0-99	Year (eg. 2001 = 1)
yy	00-99	Year with leading zero (eg. 2001 = 01)
yyy	2001, 2002, 2003, etc.	Year
yyyy	2001, 2002, 2003, etc.	Year
K	+05:00, +06:00, +07:00, etc.	Time zone information
z	+6,+7,+8, etc.	Offset from UTC
zz	+06,+07,+08, etc.	Offset from UTC with leading zero
zzz	+06:00, +07:00, +08:00, etc.	Offset from UTC represented in hours

Miscellaneous

Pattern	Example	Description
:	12:43:27	Time separator for hours, minutes, and seconds
/	05/29/1994	Date separator for months, days, and years
"	12"+"43"+"27	Displays the literal character. The application should escape the quotation marks with a backslash ( \ )
''	12''+''43''+''27	Double single quote displays the literal character

Regex Patterns

import re

pattern = 'this'
text = 'Does this text match the pattern?'

match = re.search(pattern, text)

Phone Number

^[\+]?[(]?[0-9]{3}[)]?[-\s\.]?[0-9]{3}[-\s\.]?[0-9]{4,6}$

Date

(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[13-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\d|2[0-8])(\/|-|\.)(?:(?:0?[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)?\d{2})

IPv4 Address

(\b25[0-5]|\b2[0-4][0-9]|\b[01]?[0-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}

IPv6 Address

(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))

Email Address

[^@ \t\r\n]+@[^@ \t\r\n]+\.[^@ \t\r\n]+

Social Security Number

^(?!0{3})(?!6{3})[0-8]\d{2}-(?!0{2})\d{2}-(?!0{4})\d{4}$

Hashtag

^#[^ !@#$%^&*(),.?":{}|<>]*$

Credit Card Number

(^4[0-9]{12}(?:[0-9]{3})?$)|(^(?:5[1-5][0-9]{2}|222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}$)|(3[47][0-9]{13})|(^3(?:0[0-5]|[68][0-9])[0-9]{11}$)|(^6(?:011|5[0-9]{2})[0-9]{12}$)|(^(?:2131|1800|35\d{3})\d{11}$)

Emoji

(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])

Bitcoin Address

^(bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}$

MAC Address

^[a-fA-F0-9]{2}(:[a-fA-F0-9]{2}){5}$

Latitude and Longitude

^((\-?|\+?)?\d+(\.\d+)?),\s*((\-?|\+?)?\d+(\.\d+)?)$

UUID

^[0-9a-fA-F]{8}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{12}$

Email (Simple)

[^@ \t\r\n]+@[^@ \t\r\n]+\.[^@ \t\r\n]+

Email (Complex)

(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))

Twitter Handle

\b[@]?[A-Za-z0-9_]{1,15}\b

Temperature Conversions

Fahrenheit to Celsius

Basic Conversion

°C = (°F - 30) / 2

Advanced Conversion

°C = (°F - 32) * 5 / 9

Conversion Table

°F	°C
5° F	-15° C
14° F	-10° C
23° F	-5° C
32° F	0° C
41° F	5° C
50° F	10° C
59° F	15° C
68° F	20° C
77° F	25° C
86° F	30° C
95° F	35° C
104° F	40° C
113° F	45° C
122° F	50° C
131° F	55° C
140° F	60° C
149° F	65° C
158° F	70° C
167° F	75° C
176° F	80° C
185° F	85° C
194° F	90° C
203° F	95° C
212° F	100° C

Celsius to Fahrenheit

Basic Conversion

°F = (°C * 2) + 30

Advanced Conversion

°F = (°C * (9/5)) + 32

Conversion Table

°C	°F
-15° C	5° F
-10° C	14° F
-5° C	23° F
0° C	32° F
5° C	41° F
10° C	50° F
15° C	59° F
20° C	68° F
25° C	77° F
30° C	86° F
35° C	95° F
40° C	104° F
45° C	113° F
50° C	122° F
55° C	131° F
60° C	140° F
65° C	149° F
70° C	158° F
75° C	167° F
80° C	176° F
85° C	185° F
90° C	194° F
95° C	203° F
100° C	212° F