New Mexico Legislative Session 2027: Jan. 19 to March 20

The first session of the 58th New Mexico Legislature opens at noon on Tuesday, Jan. 19, 2027, and ends at noon on Saturday, March 20, according to the New Mexico Legislature’s website. Prefiling of legislation runs from Monday, Jan. 4 to Friday, Jan. 15. This page adds the weekday for every date, a count of days from opening day, a comparison with 2026 and a free printable session tracker.

New Mexico Legislature 2027 session dates

The legislature’s home page lists six dates under the heading “The First Session of the 58th Legislature.” The table keeps its wording; the weekdays, the days from opening day and the Eastern Time (ET) conversion are ours. The noon times are Mountain Time (MT), which is 2 p.m. ET on those dates.

Date	Weekday	Days from opening day	What the legislature lists
Jan. 4, 2027 to Jan. 15	Monday to Friday	15 days before to 4 days before	“Legislation may be prefiled”
Jan. 19	Tuesday	0	“Opening day (noon)” (noon MT, 2 p.m. ET)
Feb. 18	Thursday	30	“Deadline for introduction”
March 20	Saturday	60	“Session ends (noon)” (noon MT, 2 p.m. ET)
April 9	Friday	80	“Governor’s deadline to veto legislation”
June 18	Friday	150	“Effective date of legislation not a general appropriation bill or a bill carrying an emergency clause or other specified date”

How long is the 2027 New Mexico legislative session?

By our count, March 20 falls 60 days after Jan. 19. The introduction deadline, Feb. 18, is 30 days after opening day, which makes it the 31st calendar day when Jan. 19 is day 1. The governor’s veto deadline on April 9 is 20 days after the session ends, and the June 18 effective date is 90 days after it.

When can bills be prefiled in New Mexico for 2027?

The legislature’s home page gives the prefiling window as “January 4, 2027 - January 15.” That is Monday through Friday, ending four days before opening day. It does not say who may prefile or how; those details are not covered here.

How does the 2027 session compare with 2026?

The 2026 session was shorter. The University of New Mexico Utton Center’s “The 2026 Legislative Session Tacking Sheet,” dated Jan. 20, 2026, lists the dates below for last year. The two calendars show a 60-day span in 2027 and a 30-day span in 2026; this page does not state the rule behind that difference.

Milestone	2026 (Utton Center)	2027 (legislature’s home page)
Session begins	Tue., Jan. 20, 2026	Tue., Jan. 19, 2027
Deadline for introduction	Wed., Feb. 4, 2026	Thu., Feb. 18, 2027
Session ends	Thu., Feb. 19, 2026	Sat., March 20, 2027
Pocket-veto date (2026 tacking sheet)	Wed., March 11, 2026	Governor’s deadline to veto: Fri., April 9, 2027
Effective date for most legislation	May 20, 2026	Fri., June 18, 2027

In 2026 the introduction deadline came 15 days after opening day and the March 11 date came 20 days after adjournment. In 2027 the introduction deadline is 30 days after opening day, and the April 9 veto deadline is also 20 days after adjournment.

Print the New Mexico Legislature 2027 session tracker

The free one-page tracker lists prefiling, opening day, the introduction deadline, adjournment, the veto deadline and the effective date, each with a box to check off. Pair it with a January 2027 calendar, a March 2027 calendar or a yearly calendar. Other legislatures open around the same time: see the Texas bill-filing deadlines, the Colorado Legislature 2027 session and the Oklahoma Legislature bill request deadline.

Not yet confirmed here: any change to the dates the legislature posted on Nov. 11, 2026.