OSS Opps

2026 Opportunity Calendar

A visual timeline of open source programs, grants, and internships for the year. Plan your applications ahead of time.

mentorships

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Google Season of DocsDates TBD

Google Summer of CodeDates TBD

HacktoberfestDates TBD

LFX Mentorship (CNCF / Linux Foundation)

Google Season of Docs

Dates TBD

Opens: 2025-04-01Closes: 2025-05-01

Google Summer of Code

Dates TBD

Opens: 2025-03-24Closes: 2025-04-08

Hacktoberfest

Dates TBD

Opens: 2025-09-15Closes: 2025-10-31

LFX Mentorship (CNCF / Linux Foundation)

Opens: 2026-01-09Closes: 2026-02-08

fellowships

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

MLH Fellowship

Mozilla Fellowship

MLH Fellowship

Opens: 2025-10-01Closes: 2026-01-16

Mozilla Fellowship

Opens: 2025-11-01Closes: 2026-01-30

grants

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

NLnet Foundation Grants (NGI Zero)

NLnet Foundation Grants (NGI Zero)

Opens: 2025-12-01Closes: 2026-02-01

internships

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

OutreachyDates TBD

Summer of BitcoinDates TBD

Outreachy

Dates TBD

Opens: 2025-02-07Closes: 2025-02-15

Summer of Bitcoin

Dates TBD

Opens: 2025-01-15Closes: 2025-03-15