Everything you need for precise time handling

Built for .NET developers who need accurate date, time, and timezone operations.

Vali-Time

High-precision time unit conversions with decimal accuracy. Convert between milliseconds, seconds, minutes, hours, days and more. Format, clamp, compare and break down durations.

Vali-Date

Full date arithmetic — diff, add, subtract, startOf, endOf, isWeekend, isLeapYear, weekOfYear, dayOfYear, progress in year/month and quarter operations.

Vali-Range

Expressive date range operations: union, intersection, gaps, split by day/week/month/quarter. Enumerate workdays, expand, shrink, shift and merge ranges fluently.

Vali-Calendar

Workday calendar with pluggable holiday provider support. Calculate workdays between dates, add workdays, query weeks and months, and detect first/last day boundaries.

Vali-Duration

High-precision decimal Duration value type. Factory methods from milliseconds to years, full arithmetic operators, TimeSpan interop, formatting and unit conversion.

Vali-CountDown

Deadline tracking and countdown utilities. Measure time until/since a reference point, report progress as a percentage, and format a human-readable breakdown.

Vali-Age

Age calculation from a birthdate. Get years, exact breakdown, formatted strings, relative descriptions, birthday detection, next/previous birthday and days until birthday.

Vali-Schedule

Fluent builder for recurring schedules — daily, weekly, monthly, yearly, plus a Cron engine. Query next/previous occurrences, enumerate occurrences in a range, and skip weekends/holidays.

Vali-Holiday

38+ country holiday data with Easter-based movable holidays. Register providers, check if a date is a holiday in one or more countries, get next/previous holidays and observed dates.

Vali-TimeZone

45+ curated IANA timezone zones. Convert between zones, handle DST, compute offset differences, find zones by country, format with zone info and compare instants.

Vali-BusinessHours

Cross-timezone business-hours overlap, DST-correct and midnight-crossing aware. Find overlapping windows between two offices and restrict them to workdays.

Vali-Bucket

Fixed-size, anchor-aligned time-series bucketing and aggregation. Group events into buckets and aggregate values — sum, average, min, max, count.

precision ecosystem

Eleven modules. One time ecosystem.

Eleven focused packages. Use one or all — they compose naturally.

--:--:--

ValiTimeZone.Now("local")

Vali-TimeZone

Now("America/Lima")

--:--:--

Vali-Holiday

IsHoliday(Today, "US")

—

Vali-Time

Convert(90, Min, Hours)

"1.50 h"

Vali-Range

Intersect(rangeA, rangeB)

3 overlapping days

Vali-Calendar

WorkdaysIn(30d)

~22 workdays

Vali-Duration

From(TimeSpan.FromHours(2))

"2h 0m 0s"

Vali-Schedule

Every(1,Week).On(Mon)

next: —

Vali-Age

Years(Jan 15, 1993)

33 years

Vali-CountDown

TimeUntil(NewYear)

0d remaining

Program.cs

12345678910111213

builder.Services.AddValiTempo();
// Inject what you need
public class ScheduleService(
    IValiTime time,
    IValiDate date,
    IValiHoliday holiday,
    IValiTimeZone tz) {
  public bool IsBusinessHour(string zone)
    => !holiday.IsHoliday(DateTime.Today, "PE")
        && time.Convert(9, TimeUnit.Hours, TimeUnit.Minutes)
            <= tz.Now(zone).TimeOfDay.TotalMinutes;
}