Run2 timezone dst

Skill cxcscmu/SkillLearnBench/skills/b2-self-feedback-claude-sonnet-4-6/schedule-planning/run2_timezone-dst

Convert US time zones to the calendar's local timezone, correctly handling Daylight Saving Time for dates in March through November.From its SKILL.md

Install

npx -y skills add cxcscmu/SkillLearnBench --skill run2_timezone-dst

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

SKILL.md

1.7 KB, 496 tokens by cl100k_base, as published. Nobody here has run it

Timezone Conversion with DST Awareness

DST in the US

Starts: 2nd Sunday of March at 2:00 AM → clocks spring forward 1 hour
Ends: 1st Sunday of November at 2:00 AM → clocks fall back 1 hour
During DST: PST→PDT, MST→MDT, CST→CDT, EST→EDT

March 9, 2026 Check

DST started: Sunday, March 8, 2026 at 2:00 AM
March 9 is AFTER the DST change → all US zones are in summer (DT) variants

Offset Table for March 9, 2026

Sender says	Actual zone	UTC offset	vs EDT (calendar)
PST	PDT	UTC-7	+3 hours
MST	MDT	UTC-6	+2 hours
CST	CDT	UTC-5	+1 hour
EST/ET	EDT	UTC-4	same

Conversion Examples for March 9, 2026

Sender says "1:00 PM PST":
  → PDT (UTC-7) → EDT (UTC-4) → add 3 hours
  → 4:00 PM EDT (Eastern)

Sender says "5:00 PM PST":
  → 8:00 PM EDT (Eastern)

Python (pytz)

from datetime import datetime
import pytz

pacific = pytz.timezone('America/Los_Angeles')  # handles PDT automatically
eastern = pytz.timezone('America/New_York')     # handles EDT automatically

dt = pacific.localize(datetime(2026, 3, 9, 13, 0))  # "1 PM PST"
dt_et = dt.astimezone(eastern)
print(dt_et.strftime('%I:%M %p'))  # 04:00 PM

Key Rule

When an email says "PST" but the date is in March/April–October/November, assume PDT. The +3 hour offset to Eastern still applies (PDT to EDT both shift by 1 hour each).

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.