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Table of content:

• Schedule (according to their "Registration date begin")

  Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Others

• All the OS Programs list (alphabet wise)

  A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z

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Schedule of all the OS Programs

All are categorized according to their "Registration Date Begin".

Kindly note down, All the dates are in approx. it's based on previous year tmeline on their "Official Website" . Always visit their Official Website and confirm the timeline and you can also update the timeline here, if you want then, make a issue and push a PR .

Some popular OS - Programs are marked by ⭐ .

Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	-------	--------	-----------	---------	-----	-------
⭐ MLH Fellowship (Pre-program & Open source)	Yes	Jan - Apr	Before the deadline	Jan-4th	Fellowship	Certificate, Swags & more
⭐ Linux Kernel Mentorship Program	Yes	Mar - May	mid-Jan	late-Feb	Mentorship Program	Certificate
⭐ Hyperledger Mentorship Program	Yes	Jun - Aug(Full-Time) Jun - Nov(Part-time)	Jan-28	Mar-10	Mentorship Program	Certificate
⭐ Outreachy	Yes	May - Aug	late Jan	late Feb	Internship	Certificate
Summer of Bitcoin	Yes (3000 USD)	Jan - Aug	January 1	March 15	Summer Internship Program	Internship, Job opportunity (if performed exceptionally well)
FOSSEE Semester-long Internship		Mar - Apr	Jan 08	Feb 05	Internship	Certificate
Open Mainframe Project (Linux Foundation)		Mar - May	mid-Jan	mid-Feb	OS-Program	Certificate
Cross Winter of code		Feb - Mar	Jan 25	Feb 10	University OS Program	Certificates & swags

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Google Summer of Documentation-(Docs)	Yes	Apr - Nov	9 Feb	26 Mar	OS-Program	Certificate
Mircosoft:-Reiforcement Learning Open Source Fest	Yes	May - Aug	1 Feb	1 Mar	OS-Program	Certificate
DataONE Summer Internship Programme		May - Jul	22 Feb	25 Mar	Internship	Certificate
GirlScript Summer of code-(GSSoC)		Mar - May	Feb	Mar	OS-Program	Prizes, swag rewards and internship opportunities for winners

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Google Summer of Code-(GSoC)	Yes	Mar - Sept	early Mar	mid Apr	OS-Program	Certificate
Google Summer of Earth Engine-(SoEE)	Yes	May - July	15 Mar	15 Apr	OS-Program	Certificate
Igalia Coding Experience Program	Yes		1 Mar	end of Apr	OS-Program	Certificate
RAILS GIRLS SUMMER OF CODE-(RGSOC)	Yes	Jun - Sep	02 Mar	30 Mar	OS-Program	Certificate
Processing Foundation Fellowships	Yes		Mar	2 Apr	Fellowship	Certificate
TOR Summer of Privacy	Yes		Early Mar	late Mar	OS-Program	Certificate
Codeflow - OpenForce			Mar 3		OS-Program	Certificate & Swags
X org Foundation-(EVOC)			9 Mar	13 Apr	OS-Program	Certificate

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ (LFN)-Linux Foundation Mentorship Program	Yes	Jun - Aug(full-time) & Jun - Nov(part-time)	15 Apr	10 May	Mentorship Program	Certificate
⭐ Linux Kernel Mentorship Program	Yes	Jun 1 - Aug 31	mid Apr	late-May	Mentorship Program	Certificate
ERPNext Summer of Code	Yes	May - Aug	3 Apr	14 Apr	OS-Program	Certificate
FOSSEE Summer Fellowship			17 Apr	05 May	University Fellowship	Certificate
Cross Research Experience Program			mid Apr	before May 10	OS-Program	Certificate
Open Mainframe Project -Linux Foundation	Yes		mid Apr	mid May	OS-Program	Certificate

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ MLH Fellowship (Pre-program & Open source)	Yes	May - Aug	Before the deadline	before 10 May	Fellowship	Certificate, Swags & more
Alibaba Summer of code	Yes	Aug	25 May	30 Jun	OS-Program	Certificate
Tencent Rhino-bird Open-source Training Program	Yes			before Jun	OS-Program	Certificate
Summer of Open Souce Promotion Plan	Yes	Jul - Nov	24 May	13 Jun	OS-Program	Certificate
OSS Summer of Innovation		May - Jul	1 May	5 May	University OS Program	Swags & Prizes For Winners
Hack Club SRM Summer of Code (HCSSoC)		Jun - Jul	18 May	23 Jun	University OS Program	Certificates & swag rewards
OSS World Challenge			The challenge opens every "May" then close by "September"		Competitions	Prizes for winners
Bountiful Open Source Summer-BOSS		May - Aug		before 15 Aug	Competitions	Prizes For Winners & top performers

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Open Summer of Code-(OSoC)	Yes	Jul	Jun	early-Jul	OS-Program	Certificate
ACM MM Open Source Software Competition			Early Jun	25 Jun	Competitions	Prizes For Winners
PClub Summer Of Code			Early Jun	late Jun	OS-Program
Script Fellowship Program		Aug - Nov	1 Jun	25 Jul	Fellowship	Certificate

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Open Mainframe Project-Linux Foundation	Yes		mid Jul	mid Aug	OS-Program	Certificate
⭐ Linux Kernel Mentorship Program	Yes	Sep 1 - Nov 30	mid-Jul	late-Aug	Mentorship Program	Certificate
Witnet Summer of Code Program-(WSoC)				before 15 Jul	OS-Program	Certificate
Mozilla Winter of Security			29 Jul	15 Sep	OS-Program	Certificate

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Outreachy	Yes	Dec to Mar	mid Aug	late Sept	Internship	Certificate
Girlscript winter of code (docs)		Sep - Nov	Early Aug	late Aug	OS - Program	Swag rewards for top performer, Certificate

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ MLH Fellowship (Pre-program & Open source)	Yes	Sep - Dec	Before the deadline	before 13 Sept	Fellowship	Certificate, Swags & more
⭐ Hacktober Fest by Digital Ocean		Oct	Sep	Oct	Competitions	Swag Rewards
GNOME Internship Program	Yes	Dec - Mar	1 Sep	1 Oct	Internship
Script Winter of code-(SWoC)		Nov - Mar	10 Sep	10 Nov	OS - Program	Prizes, swag rewards, Certificate
Semester Long Projects (SLoP by DA-IICT)		Sep - Nov	15 Sep	late Sept	University OS Program	Certificates & swag rewards
Google Code-in (GCI)		Timeline		before Oct	Competitions	Prizes for winners

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
IIIT-Kalyani Winter of code 2.0		Dec - Feb	1 Oct	7 Nov		Certificates & swag rewards
Delta Winter of Code-(DWoC)		Nov - Jan	19 Oct	22 Nov	University OS Program	Certificates & swag rewards
NJACK Winter Of Code		Dec - Jan	22 Oct	late Nov	University OS Program	Certificates & swag rewards

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Foss Asia Codeheat		Nov - Jan	runs from Nov 10	11 May	Competition	Cash Prizes For Winners
Winter of code by NSEC		Dec - Jan	20 Nov	6 Dec	University OS Program	Certificates & swag rewards
Kharagpur Open Source Society-(KWoC)		Dec - Jan	26 Nov	6 Dec	University OS Program	Certificates & swag rewards
DevScript Winter of code		Dec - Mar	30 Nov	25 Dec	University OS Program	Certificates & swag rewards

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Season of KDE		Jan - Mar	15 Dec	15 Jan	OS - Program
JGEC Winter of code		Dec -Feb	7 Dec	7 Dec	University OS Program	Certificates & swag rewards
24 Pull Requests		Dec	Send 24 pull requests between December 1st and December 24th		Competitions

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Name	Stipend	Timeline	Registration Date Begin (Approximately)	Deadline (Approx.)	Type	Awards
	--------	--------	----------------	--------	-----	--------
⭐ Free Software Foundation (FSF) Intership Program			winter: December 8 summer: May 10 Fall: September 2. spring: November 29		Intership
⭐ (CNCF)-Community Bridge Mentorship Program	Yes		Summer - (CNCF) participates in LFX Mentorship (ex-CommunityBridge), GSOC , GSOD , CROSS Research Experience Program
⭐ Redox Summer of code	Yes		In Summer
⭐ Julia Season of Contribution-(JSOC)	Yes		It takes part in - GSOC & GSOD		OS - Program	Certificate
⭐ Foss Asia Intership Program	Yes		Whole Year		OS - Program
John Hunter Matplotlib Summer Fellowship	Yes		Summer - 3 monthes		Fellowship
Radare Summer of Code	Yes		RSoC Project take part in GSOC
Summer of Haskell	Yes		SOH projects take part in GSOC
The X.Org Endless Vacation of Code-(EVoC)	Yes		EVoC mentorship can be initiated at any time during the calendar year
RARE Technologies Student Incubator Programme	Yes		Poject take part in GSOC & It took place in Summer			scholarships and financial rewards
Vectorised IO	Yes		Not found
Snowplow	Yes		Not found
RubyMe Mentorship Program	Yes		Not found		Mentorship
Kubernetes Shadows Program			Shadows are selected via the Release Team Shadow Application, which usually opens up around the end of a release/beginning of the next release
Millennium Fellowship			Applications for this is open for whole year except Aug to Nov		Fellowship
Microsoft Learn Student Ambassador Program			Application form is open throughout the year
OpenCode IIITA			starting in October for student		University OS Program	Certificates & swag rewards
Tweag I/O Summer Internship			Not found		Internship
Segment Open Fellowship			Not found		Fellowship
Sanscript Autumn of Open Source			Not found	University OS Program	Certificates & swag rewards
RGSOC			Not found
Quantopian Open			Not found		Competitions	Cash prizes for winners
OWASP SOC			Not found
MDG Winter of Code			Not found
ICFOSS Fellowship Programme			Not found		Fellowship
Halite AI Bot Challenge			Not found		Competitions	Swag rewards for winners
HackinCodes Contributor Hack			Not found		Competitions	Prizes, swag rewards, Certificate
Data Driven Competition			Not found		Competitions	Cash Prizes For Winners
(DAWOC)-DA-IICT Winter of Code			Not found
Cats winter of code			Not found
Educational Externship Track			Not found		Externship
Data Observation National of Earth			Not found
SOCIS			Not found
Open Innovation Project			Not found
Open Source Track Explorer			Not found
Free Software Observation			Not found

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All the OS Programs list

• Alibaba Summer of code
• ACM MM Open Source Software Competition

• Bountiful Open Source Summer-BOSS

• (CNCF)-Community Bridge Mentorship Program
• Cross Research Experience Program
• Cross Winter of code
• Cats winter of code

• Data Driven Competition
• Delta Winter of Code-(DWoC)
• DevScript Winter of code
• DataONE Summer Internship Programme
• (DAWOC)-DA-IICT Winter of Code
• Data Observation National of Earth

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• ERPNext Summer of Code
• Educational Externship Track

• Foss Asia Codeheat
• Foss Asia Intership Program
• Free Software Foundation (FSF) Intership Program
• FOSSEE Summer Fellowship
• FOSSEE Semester-long Internship
• Free Software Observation

• Google Summer of Code-(GSoC)
• Google Summer of Documentation-(Docs))
• Google Summer of Earth Engine-(SoEE)
• GNOME Internship Program
• GirlScript Summer of code-(GSSoC)
• Girlscript winter of code (docs)
• Google Code-in (GCI)

• Hyperledger Mentorship Program
• Hacktober Fest by Digital Ocean
• Hack Club SRM Summer of Code (HCSSoC)
• Halite AI Bot Challenge
• HackinCodes Contributor Hack

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• Igalia Coding Experience Program
• IIIT-Kalyani Winter of code 2.0
• ICFOSS Fellowship Programme

• Julia Season of Contribution-(JSOC)
• John Hunter Matplotlib Summer Fellowship
• JGEC Winter of code

• Kubernetes Shadows Program
• Kharagpur Open Source Society-(KWoC)

• (LFN)-Linux Foundation Mentorship Program
• Linux Kernel Mentorship Program

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• MLH Fellowship (Pre-program & Open source)
• Mircosoft:- Reiforcement Learning Open Source Fest
• Millennium Fellowship
• Microsoft Learn Student Ambassador Program
• Mozilla Winter of Security
• MDG Winter of Code

• NJACK Winter Of Code

• Outreachy
• Open Mainframe Project (Mentorship Program) (Linux Foundation)
• Open Summer of Code-(OSoC)
• OSS Summer of Innovation
• OpenCode IIITA
• OSS World Challenge
• OWASP SOC
• Open Source Track Explorer
• Open Innovation Project

• Processing Foundation Fellowships
• PClub Summer Of Code

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• Quantopian Open

• Redox Summer of code
• Radare Summer of Code
• RARE Technologies Student Incubator Programme
• RubyMe Mentorship Program
• RGSOC

• Season of KDE
• Summer of Haskell
• Summer of Bitcoin
• Snowplow
• Summer of Open Souce Promotion Plan
• Script Winter of code-(SWoC)
• Script Fellowship Program
• Semester Long Projects (SLoP by DA-IICT)
• Sanscript Autumn of Open Source
• Segment Open Fellowship
• SOCIS

• Tencent Rhino-bird Open-source Training Program
• The X.Org Endless Vacation of Code-(EVoC)
• TOR Summer of Privacy
• Tweag I/O Summer Internship

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• Vectorised IO

• Winter of code by NSEC
• Witnet Summer of Code Program-(WSoC)

• X org Foundation-(EVOC)

• 24 Pull Requests

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