National Sisters Day2026 · Date · History · Messages
National Day Calendar identifies the first Sunday in August as the annual date and attributes creation in 1996 to Tricia Eleogram; New Jersey workforce-engagement material independently uses the same recurrence/date.
About National Sisters Day
National Sisters Day is observed in the United States on the first Sunday in August as a family-appreciation day centered on sisters and sister-like relationships.
A 1996 Tennessee legislative record gives the observance a documented early history: it attributes the idea to Tricia Eleogram, founder and president of the Sisters’ Day Council, and describes 2 August 1996 as the first annual Sisters’ Day.
Why National Sisters Day matters
The day is an opportunity to acknowledge supportive sibling relationships while recognizing that family experiences vary. Participation can include biological sisters, adoptive or step-sisters, chosen-family relationships or simply reflection on an important bond.
The documented calendar history needs care. Tennessee’s 1996 resolution anticipated the first Friday in August after the inaugural date, whereas modern sources use the first Sunday; the sources used here do not establish when or why that rule changed.
History of National Sisters Day
Tennessee HJR 378, introduced in 1996, states that setting aside a special day for sisters was the idea of Tricia Eleogram, founder and president of the Sisters’ Day Council.
The resolution described 2 August 1996 as the first annual Sisters’ Day and anticipated celebration on the first Friday in August thereafter. Tennessee formally designated 2 August 1996 as Sisters’ Day.
Modern observance sources, including a New Jersey state workforce calendar, use the first Sunday in August. No primary record reviewed for this guide establishes the transition date from the earlier Friday rule to the modern Sunday rule.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
Tricia Eleogram
Tennessee HJR 378 states that setting aside a special day for sisters was her idea and identifies her as founder and president of the Sisters’ Day Council.
First documented observance
Tennessee HJR 378 describes 2 August 1996 as the first annual Sisters’ Day.
Tennessee designated 2 August 1996 as Sisters’ Day and recognized the first annual observance, with a first-Friday-in-August recurrence described for later years.
Tennessee General Assembly · HJR 378
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.
5 fields not established in reviewed sources
Later institutional actions
Later recognition, renaming, mergers or date changes are kept separate from original establishment.
Also known as
National Sisters Day, Sisters Day
How to Observe National Sisters Day
Call, write or spend time with a sister or sister-like person in a way that fits the relationship and respects individual boundaries.
Share a specific memory or quality you appreciate rather than relying only on a generic greeting.
Create or preserve a family record—such as a labeled photo, short oral-history recording or written memory—that future relatives can understand.
If the relationship is complicated or distant, observe privately through reflection rather than feeling pressure to perform closeness.
National Sisters Day Facts
National Sisters Day is observed on the first Sunday in August under the modern recurrence.
Tennessee HJR 378 identifies Tricia Eleogram as the person whose idea led to Sisters’ Day and describes her as founder and president of the Sisters’ Day Council.
The same 1996 resolution describes 2 August 1996 as the first annual Sisters’ Day.
Tennessee’s 1996 resolution used a first-Friday-in-August recurrence, while modern sources use the first Sunday.
The transition date and reason for that recurrence change are not established by the primary materials used here.
National Sisters Day Messages
May National Sisters Day encourage informed attention, respectful participation and useful action beyond a single date.
Wishing everyone observing National Sisters Day a day of learning, connection and purposeful follow-through.
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.
New Jersey Treasury — Workforce engagement calendar (opens in a new tab)
State Government Calendar
Tennessee General Assembly — HJR 378 (opens in a new tab)
Tennessee General Assembly — legislative record for HJR 378 (opens in a new tab)
National Day Calendar — National Sisters Day (opens in a new tab)
Observance Registry
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 National Sisters Day?
First Sunday in August The documented recurrence rule is: First Sunday in August each year..
Does National Sisters Day fall on the same date every year?
It follows a recurring calendar rule, so the Gregorian date can change from year to year.
Is National Sisters Day an official public holiday?
The reviewed sources verify it within this scope: United States / informal family-appreciation observance. 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 National Sisters Day?
The documented basis is: National Day Calendar identifies the first Sunday in August as the annual date and attributes creation in 1996 to Tricia Eleogram; New Jersey workforce-engagement material independently uses the same recurrence/date.. Supporting evidence includes National Day Calendar — National Sisters Day. The site does not infer a separate creator or founder unless reviewed evidence establishes one.
Is National Sisters Day international or country-specific?
This observance is specific to United States. Its fuller verified scope is: United States / informal family-appreciation observance.
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 2026-09-10.
When is National Sisters Day?
Under the modern recurrence it is observed on the first Sunday in August.
Who started Sisters’ Day?
Tennessee HJR 378 attributes the idea to Tricia Eleogram, founder and president of the Sisters’ Day Council.
Was it always on the first Sunday in August?
No. The 1996 Tennessee resolution anticipated the first Friday in August after the inaugural 2 August 1996 observance. The sources used here do not establish when the modern first-Sunday rule replaced that earlier schedule.
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