.NET Standard 2.0
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Additional Details

This is the last strong named package. CronBuilder is updated to use the standard cron functionality, serialization, and not strong named.

Install-Package Cron.Core.StrongNamed -Version
dotnet add package Cron.Core.StrongNamed --version
<PackageReference Include="Cron.Core.StrongNamed" Version="" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Cron.Core.StrongNamed --version
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: Cron.Core.StrongNamed,"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install Cron.Core.StrongNamed as a Cake Addin
#addin nuget:?package=Cron.Core.StrongNamed&version=

// Install Cron.Core.StrongNamed as a Cake Tool
#tool nuget:?package=Cron.Core.StrongNamed&version=
The NuGet Team does not provide support for this client. Please contact its maintainers for support.


Cron Builder object that can be used to build Cron expressions, describe them, and manipulate objects.

Feature Overview

  1. Build Cron Expression.
  2. Create Cron by Expression.
  3. Display Description of Cron expression or a section.
  4. Expression Chaining of Cron object and Sections (Seconds, Minutes, Hours, DayMonth, Months, DayWeek, Year).
  5. Set intervals or specific times on Time Sections (Seconds, Minutes, Hours).
  6. Set specific date sections (DayMonth, Months, DayWeek, Year).


Create a new CronBuilder Object.

Create Default Cron Object.

    schedule = new CronBuilder();

Create Cron object with an existing expression.

    var cron = new CronBuilder(expression);

Create Initial Cron object with Days.

    var cron = new CronBuilder
                { CronDays.Thursday, CronDays.Saturday }

Create Initial Cron object with Months.

    var cron = new CronBuilder
        { CronMonths.August, CronMonths.November }

Create Initial Cron object with Months and Day.

    var cron = new CronBuilder
        { CronDays.Thursday, CronMonths.November }

Build Cron by Section.

Add to Cron with sections.

    schedule.Add(time: CronTimeSections.Seconds, value: seconds, repeatEvery: true)
    schedule.Add(CronTimeSections.Minutes, 4)
    schedule.Add(CronTimeSections.Hours, 3, 5)

Add a Month Restriction to the Cron Expression.


Add a Day of the Week Restriction to the Cron Expression.


Chain Cron and Sections.

    schedule = new CronBuilder();
        .Add(CronTimeSections.DayMonth, dayMonth)
        .Add(CronTimeSections.Years, years, true)

Display Cron Description

    var descCron = cron.Description;
    var descSeconds = cron.Seconds.Description;

Remove all or parts of a Cron Expression.

Remove only one entry of 5 in Seconds.

    cron.Remove(CronTimeSections.Seconds, 5);                

Remove only one entry Range of Seconds.

    cron.Remove(CronTimeSections.Seconds, 5, 6);

Reset / Remove All of the Day of the Week section.


Reset all sections to the defaults.




Minor Cleanup and Fixes / Update packages.


Cron Object renamed to CronBuilder to simplify creation due to conflicting namespace.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated 356 1/23/2021 347 11/22/2020 234 11/17/2020 323 11/15/2020 714 11/12/2020 448 11/10/2020 Cron renamed to Cron Builder. Bug Fixes in Description property.