IANA tz database · zone identifier

America/Matamoros

The IANA tz database identifier for Central Standard Time in Mexico. Store this string — not the abbreviation, not the offset — and your timestamps stay correct forever.

UTC-05:00Abbreviation CDTObserves daylight saving
Time in America/Matamoros☾ Night
18:00:17
Wednesday, October 14, 2026
Offset
UTC-05:00
Abbreviation
CDT
DST
Active

Current offset

UTC-05:00

standard UTC-06:00 · daylight UTC-05:00

Abbreviation

CDT

the daylight-saving form

DST behaviour

Observes

changes clocks twice a year

Country

🇲🇽 Mexico

ISO 3166: MX · view country page →

Using this identifier

The string to put in your code.

America/Matamoros is the identifier to use in code and config for this region. Every modern language, database, and OS resolves it through the same tz database, so the examples here behave identically everywhere.

Avoid storing CDT or -05:00 — abbreviations are ambiguous and fixed offsets can't follow rule changes.

// format a date in this zone
new Intl.DateTimeFormat('en-US', {
timeZone: 'America/Matamoros',
dateStyle: 'full', timeStyle: 'long'
}).format(new Date());

Offset & DST behaviour

Two offsets,
every year.

America/Matamoros alternates between CST (UTC-06:00) and CDT (UTC-05:00). Right now it is on CDT; clocks fall back on 1 November 2026.

The year at a glance

CST · UTC-06:00CDT · UTC-05:00CST · UTC-06:008 Mar · +1h1 Nov · −1h Jan 2026 Dec

Technical record

The database entry, in full.

source: IANA tz database · release 2026d

IdentifierAmerica/Matamoros
ISO country codeMX🇲🇽 Mexico
Reference coordinates25.83°N, 97.50°Wtz database reference point
Standard offsetUTC-06:00abbreviation CST
Daylight offsetUTC-05:00abbreviation CDT
tzdb release2026ddata current as of this IANA release

Where it applies

One of Mexico's 12 zones.

Looking for travel-friendly info? See Reynosa or Central Standard Time.

🇲🇽
Mexico

132M people, 12 time zones — this identifier covers one of them.

Country page →
🇲🇽 Reynosa
18:00
18:00:17 · CDT
pop. 692KCST
🇲🇽 Heroica Matamoros
18:00
18:00:17 · CDT
pop. 542KCST

Related identifiers

Nearby in the database.

Same zone group · Central Standard Time

other identifiers keeping CST

Same offset · UTC-05:00

other zones keeping this offset right now

Frequently asked questions

Answers specific to this identifier — generated from the database record. Can't find what you need? Email [email protected].

What UTC offset is America/Matamoros?
America/Matamoros is currently UTC-05:00 (CDT). It alternates between UTC-06:00 in winter and UTC-05:00 in summer.
Does America/Matamoros observe daylight saving time?
Yes. Clocks fall back at the next transition on 1 November 2026, as they do twice every year.
Which country uses America/Matamoros?
Mexico. It is one of 12 IANA zones covering the country.
Is America/Matamoros the same as CST?
America/Matamoros is one of the IANA zones that keeps Central Standard Time (CST). Use America/Matamoros in software — CST is a human-friendly label, not a valid identifier.

Free · Developer API

This zone, as JSON.

Its live offset, abbreviation, DST status and next clock change, plus its coordinates and country, from one endpoint.

GET /v1/timezones Live

Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.

Get your free API key → All endpoints Plans and pricing

Moving off WorldTimeAPI? Our drop-in replacement needs no key.

// this identifier, resolved live
GET /v1/timezones/America/Matamoros
{
"data": {
"iana": "America/Matamoros",
"observes_dst": true,
"country": { "code": "MX", "name": "Mexico" },
"current": {
"utc_offset": "-05:00",
"abbreviation": "CDT",
…
},
…
}
}