Area code 630 serves many communities in Illinois. Knowing the time zone associated with the 630 area code can be tricky, since Illinois observes daylight savings time.
This article clarifies the time zone and daylight savings time schedule for the 630 area code.
Central Time Zone
If you’re calling someone in the 630 area code, remember that it’s in the Central Time (CT) zone. This means that 630 is in Central Standard Time (CST) for part of the year and Central Daylight Time (CDT) for the rest.
CST is what we call it during standard time, while CDT is in effect during Daylight Saving Time.
The time zone offset is -6:00 hours during CST and -5:00 hours during CDT relative to Coordinated Universal Time (UTC) and Greenwich Mean Time (GMT).
Daylight Saving Time in 2025
If you live in the 630 area code, here’s what you need to know about Daylight Saving Time in 2025:
- Daylight Saving Time begins on Sunday, March 9, 2025, at 2:00 AM CDT.
- Daylight Saving Time ends on Sunday, November 2, 2025, at 2:00 AM CDT.
During Daylight Saving Time, clocks are set forward by one hour, so sunrise and sunset happen later in the day.
Key Cities and Communities Served
Area code 630 serves many cities and communities in Illinois. You can find a full list online, but a few examples of major cities within the 630 area code include Naperville, Aurora, and Downers Grove.
Knowing which communities the area code covers can be useful for businesses or anyone targeting a specific geographic area.
Conclusion
The 630 area code is in the Central Time Zone and observes Daylight Saving Time. Knowing this is important for communication, scheduling, and all kinds of business operations.