303 Day2026 · Date · History · Messages
Roland describes 303 Day as the TB-303 celebration day observed every year on 3 March and documents the inaugural 303 Day on 3 March 2019.
About 303 Day
303 Day is observed on 3 March as a celebration of Roland’s TB-303 Bass Line and its influence on electronic music, especially acid house and related styles.
The observance is best understood as a manufacturer-led music-culture day rather than an official civic or international day. Its authority comes from Roland’s own launch and continuing 303 Day material.
Why 303 Day matters
The TB-303 was originally released as a bass accompaniment instrument, but musicians later used its distinctive resonant filter and sequencing behavior in ways that became closely associated with acid house.
303 Day gives listeners, artists and music-technology communities a date to explore the instrument’s history, sound design and cultural afterlife without treating one machine as the sole origin of an entire genre.
History of 303 Day
On 3 March 2019, Roland announced that it was celebrating the inaugural 303 Day while launching a software recreation of the TB-303 through Roland Cloud.
Roland’s current 303 Day material identifies 3 March as the annual date for the celebration.
The reviewed sources establish the inaugural observance and annual date, but they do not explicitly document a separate formal adoption instrument or an official explanation of why the numeric date 3/03 was selected.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Roland Corporation
Roland’s 3 March 2019 press release states that Roland was celebrating the inaugural 303 Day.
Roland Corporation
Roland press release announcing the inaugural 303 Day
First documented observance
Roland explicitly calls 3 March 2019 the inaugural 303 Day.
Roland Corporation
Roland maintains a dedicated 303 Day page and continuing first-party observance material.
What the evidence establishes
Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.
3 fields not established in reviewed sources
Also known as
World Tb-303 Appreciation day, TB-303 Appreciation Day
How to Observe 303 Day
Listen to examples of acid house and compare how artists use the TB-303-style bass sound in different ways.
Explore Roland’s historical material on the original TB-303 and compare the hardware workflow with modern software recreations.
Create a short bass pattern while documenting which synthesis and sequencing choices produce the characteristic sound.
Use the day to learn about the producers and scenes that transformed a commercially modest instrument into a major part of electronic-music history.
303 Day Facts
303 Day is observed on 3 March.
Roland described 3 March 2019 as the inaugural 303 Day.
The observance centers on the TB-303 Bass Line and its influence on electronic music.
Roland is the first-party source for the launch and recurring celebration.
The reviewed sources do not establish a separate formal instrument or an explicit date-selection statement.
303 Day Messages
Happy 303 Day — a good time to revisit the sounds, artists and production ideas that gave a small bass machine an outsized musical legacy.
May 303 Day bring a little curiosity to the history of electronic music and the creative ways musicians reshape technology.
Celebrate 303 Day by listening closely, experimenting boldly and giving credit to the artists and scenes that turned the TB-303 into a cultural icon.
Wishing producers, listeners and synth enthusiasts a creative 303 Day filled with good grooves and better discoveries.
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
Evidence & sources
Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.
Roland press release — inaugural 303 Day (opens in a new tab)
Manufacturer Press Release
Roland — 303 Day (opens in a new tab)
Manufacturer Campaign
Understand it, compare it, then explore further
Start with the most common factual questions, then compare closely related observances and explore useful connections.
Frequently asked questions
When is 303 Day?
3 March The documented recurrence rule is: 3 March.
Does 303 Day fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is 303 Day an official public holiday?
The reviewed sources verify it within this scope: Roland / global electronic-music and TB-303 community celebration. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.
Who established or recognizes 303 Day?
The reviewed sources identify Roland Corporation as the proclaiming or establishing body. Current facilitation or coordination is recorded as Roland Corporation.
Is 303 Day international or country-specific?
The documented scope is international or global: Roland / global electronic-music and TB-303 community celebration. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-09-09.
When is 303 Day?
It is observed on 3 March.
Who started 303 Day?
Roland’s own 2019 press release describes 3 March 2019 as the inaugural 303 Day, making Roland the directly documented launching organization.
Is 303 Day an official public holiday?
No. It is a music and product-culture observance associated with Roland and the TB-303 community, not a public holiday.
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Mother’s Day
Article 30 of Georgia’s current Labour Code lists March 3 as Mother’s Day among statutory holidays; the Public Defender states that the date has been celebrated in Georgia since 1991.
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