Is There Tachanun Today?

For centuries, Jews have asked the same question over and over. Is there Tachanun today? Can I go eat breakfast just a few minutes earlier? Oh and if it's a Monday or a Thursday, there's no greater simcha than not saying tachanun.

I present IsThereTachanunToday.com, a website which answers this question for the davener wondering if he or she can go straight onto Ashrei.

Installation

To run locally, execute

pip install -r requirements.txt
export FLASK_APP=index.py
export FLASK_ENV=development
flask run

Requires Python 3.7.x

API

IsThereTachanunToday.com also has an API that can report whether or not there is tachanun.

GET /api

Returns JSON with information on whether there is Tachanun today in Chutz La'aretz. Without any parameters it will return information on the current day.

Parameter	Description	Format	Example	Required
gregorian_date	The Gregorian date for which to retrieve Tachanun information.	"<year>-<month>-<date>"	April 28, 2021 is "2021-04-28"	Optional
hebrew_date	The Hebrew date for which to retrieve Tachanun information. Each value is an integer, and the month value starts with Nissan as 1.	"<year>-<month>-<date>"	16 Iyyar 5781 is "5781-02-16"	Optional

GET /api/il

Functions the same way as /api, but returns information for Israel.