Date Time

Calculate age online from birth and as-of dates, then review calendar age, elapsed totals, birthdays, milestones, and exportable planning records.

Calculate birthday timing online from a birth date and reference date, then track the next birthday, milestone ages, and round-number life markers for planning.

Calculate business days online between dates or shift deadlines by workdays with weekend patterns, holiday exclusions, and handoff notes for scheduling.

Track CBT-I sleep diary entries online, measure sleep efficiency and wake drift trends, and export structured summaries for insomnia follow-up.

Calculate online CBT-I sleep windows from baseline sleep time and a fixed wake target, then compare projected efficiency, bedtime shifts, and weekly review steps.

Plan coffee recipes online across pour-over, French press, cold brew, espresso, and moka pot with dose, water, TDS, schedules, and repeatable dial-in cues.

Check coffee freshness windows online from roast date, brew method, roast level, grind state, storage exposure, and use pace to plan brewing and avoid stale bags.

Track countdown timers online, convert targets across time zones, add buffers and reminders, keep your data local for launches, trips, and deadlines.

Check current time online in local or UTC mode with Unix seconds, milliseconds, and snapshot-ready exports for handoffs, audits, or status notes.

Calculate datetime differences online with timezone-aware elapsed totals, workday and business-hour breakdowns, and checkpoint exports for scheduling handoffs.

Convert online epoch timestamps into UTC, fixed-offset, or named-zone date-times with ISO, Julian day, and export-ready details for logs and scheduling.

Draft garden calendar planner that merges planting calendar generation and garden bed planning into one disabled seasonal workflow.

Practice delayed gratification online with a timer, urge-response prompts, streak tracking, and coaching cues that make waiting for a chosen reward easier.

Calculate invoice deadlines online from invoice date, net or end-of-month terms, weekend and holiday rules, and status date for payment follow-up.

Calculate invoice late fees online from due dates, grace periods, fixed fees, percentage charges, daily rates, and interest terms for payment reminders.

Plan online meditation sessions with countdown setup, interval bells, visual flashes, and exportable schedules for steadier solo or group practice.

Check online current time in local or UTC mode with seconds, offset, Unix timestamp, ops notes, and exports for shared displays, handoffs, and audits.

Calculate ovulation timing online from your last period and cycle details, then review fertile windows, cycle maps, and planning notes for conception timing.

Run online Pomodoro focus cycles with custom work and break lengths, goal ETA, alerts, schedule previews, and exports for planned work sessions.

Calculate pregnancy due dates online from LMP, conception, IVF transfer, or ultrasound dating, then map visit windows and milestones for prenatal planning.

Time progressive muscle relaxation online with preset routines, split-side pacing, optional cues, charts, audits, and exports for repeatable calm practice.

Predict race finish time online from a prior result, adjust conditions and Riegel exponent, and compare splits and scenarios for pacing decisions.

Draft race timer suite that consolidates general and athletics race timing into one disabled split-tracking workflow.

Calculate sleep debt online from recent nightly sleep logs, deficit caps, oversleep credit, and recovery lanes to plan catch-up sleep with clearer assumptions.

Plan sleep window changes online from weekly sleep efficiency, a fixed wake time, and threshold rules to compare bedtimes and follow-up decisions.

Track Swiss rail services online with live departure or arrival boards, destination and line filters, and delay snapshots to plan platforms and connections.

Generate tempo practice plans online with metronome playback, tap tempo, swing control, and ramp blocks so you can steady timing and build speed in stages.

Calculate time durations online between clock readings or shift a base time with breaks, rounding, and day offsets for payroll, schedules, and handovers.