Check when daylight saving time starts and ends in the US for any year. Shows the exact dates and DST period length. Everything runs locally in your browser — nothing is uploaded.
Find the ISO week number for any date. Also shows the day of the week and the current week of the year. Everything runs locally in your browser — nothing is uploaded.
Calculate the time elapsed between any date and now. Shows results in years, months, weeks, days, hours, minutes, and seconds. Everything runs locally in your browser — nothing is uploaded.
Calculate the day number of the year for any date. Find out which day of 365 (or 366) a specific date represents. Everything runs locally in your browser — nothing is uploaded.
Convert time between different time zones. Enter a time and your source/target time zones and see the converted result. Everything runs locally in your browser — nothing is uploaded.
Check the status of hundreds of URLs at once — find broken links, redirects, and dead pages across your entire website. Essential for SEO audits before Google crawls your site. Everything runs locally in your browser — nothing is uploaded.
DST Checker (US) lets you check when daylight saving time starts and ends in the US for any year. Shows the exact dates and DST period length. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Check when daylight saving time starts and ends in the US for any year. Shows the exact dates and DST period length. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Enter one or more URLs to analyze.
Yes. After the initial page load, DST Checker (US) runs entirely on your device with no internet connection needed. All processing is done locally.
Yes, this tool is completely free with no usage limits, registration, or credit card required.
All processing happens locally in your browser. Your data is never uploaded to any server.
Yes. After the initial page load, the tool runs entirely offline without requiring an internet connection.
No. You can use this tool unlimited times with no quotas or restrictions.
Any modern web browser (Chrome, Firefox, Safari, Edge) on desktop or mobile. No installation needed.
Percentage Calculator
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
Age Calculator
Computes exact age in years, months, days, hours, minutes, and seconds from a given birth date relative to any target date. Everything runs locally in your browser — nothing is uploaded.
ETA Calculator
Estimate travel time from distance and speed — with optional arrival time.
Study Time Calculator
Calculate total study hours over a period and see monthly projections.
Test Score Calculator
Convert correct/total answers to percentage and letter grade.
Words Per Page Calculator
Estimate how many pages your word count will take at different font sizes.