Cron Builder & Explainer

Fire times are computed live in your browser against the current moment — they appear here once the page loads, never baked in.

• The dialect is explicit: five fields (minute hour dom month dow) or six with a seconds field first. A 6-field expression under the 5-field dialect is an error naming both counts — never a guess.
• The timezone is part of the question, not a display detail: the same expression fires at different instants in different zones, so fire times are computed in the zone you name (cron-parser’s tz) and shown in it (Intl).
• Day-of-month × day-of-week is the Vixie OR rule: when BOTH are restricted (neither is *), a date matching EITHER fires. Every other field combination is an AND — the badge above says when the OR rule applied.
• The sentence is cronstrue’s, labeled as its own output; the fire times are cron-parser’s. Two engines, two jobs, neither blended.