# Class NodaConstants

Useful constants, mostly along the lines of "number of milliseconds in an hour".

**Since**2.4.x

**Availability**net35-Client, PCL

##### Inheritance

Object

NodaConstants

##### Inherited Members

Object.ToString()

Object.Equals(Object)

Object.Equals(Object, Object)

Object.ReferenceEquals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

**Namespace**: NodaTime

**Assembly**: NodaTime.dll

##### Syntax

`public static class NodaConstants`

### Fields

#### BclEpoch

The instant at the BCL epoch of midnight 1st January 0001 UTC.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public static readonly Instant BclEpoch`

##### Field Value

Type | Description |
---|---|

Instant |

#### DaysPerStandardWeek

Number of days in a standard Gregorian week.
The value of this constant is 7.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int DaysPerStandardWeek = 7`

##### Field Value

Type | Description |
---|---|

Int32 |

#### HoursPerStandardDay

A constant for the number of hours in a standard day. Note that the number of hours
in a day can vary due to daylight saving effects.
The value of this constant is 24.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int HoursPerStandardDay = 24`

##### Field Value

Type | Description |
---|---|

Int32 |

#### HoursPerStandardWeek

A constant for the number of hours in a standard week of seven 24-hour days.
The value of this constant is 168.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int HoursPerStandardWeek = 168`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MillisecondsPerHour

A constant for the number of milliseconds per hour.
The value of this constant is 3,600,000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MillisecondsPerHour = 3600000`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MillisecondsPerMinute

A constant for the number of milliseconds per minute.
The value of this constant is 60,000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MillisecondsPerMinute = 60000`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MillisecondsPerSecond

A constant for the number of milliseconds per second.
The value of this constant is 1000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MillisecondsPerSecond = 1000`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MillisecondsPerStandardDay

A constant for the number of milliseconds per standard 24-hour day.
The value of this constant is 86,400,000.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MillisecondsPerStandardDay = 86400000`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MillisecondsPerStandardWeek

A constant for the number of milliseconds per standard week of seven 24-hour days.
The value of this constant is 604,800,000.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MillisecondsPerStandardWeek = 604800000`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MinutesPerHour

A constant for the number of minutes per hour.
The value of this constant is 60.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MinutesPerHour = 60`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MinutesPerStandardDay

A constant for the number of minutes per standard 24-hour day.
The value of this constant is 1,440.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MinutesPerStandardDay = 1440`

##### Field Value

Type | Description |
---|---|

Int32 |

#### MinutesPerStandardWeek

A constant for the number of minutes per standard week of seven 24-hour days.
The value of this constant is 10,080.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int MinutesPerStandardWeek = 10080`

##### Field Value

Type | Description |
---|---|

Int32 |

#### SecondsPerHour

A constant for the number of seconds per hour.
The value of this constant is 3,600.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int SecondsPerHour = 3600`

##### Field Value

Type | Description |
---|---|

Int32 |

#### SecondsPerMinute

A constant for the number of seconds per minute.
The value of this constant is 60.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int SecondsPerMinute = 60`

##### Field Value

Type | Description |
---|---|

Int32 |

#### SecondsPerStandardDay

A constant for the number of seconds per standard 24-hour day.
The value of this constant is 86,400.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const int SecondsPerStandardDay = 86400`

##### Field Value

Type | Description |
---|---|

Int32 |

#### SecondsPerWeek

A constant for the number of seconds per standard week of seven 24-hour days.
The value of this constant is 604,800.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const int SecondsPerWeek = 604800`

##### Field Value

Type | Description |
---|---|

Int32 |

#### TicksPerHour

A constant for the number of ticks in an hour. The value of this constant is 36,000,000,000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const long TicksPerHour = 36000000000L`

##### Field Value

Type | Description |
---|---|

Int64 |

#### TicksPerMillisecond

A constant for the number of ticks in a millisecond. The value of this constant is 10,000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const long TicksPerMillisecond = 10000L`

##### Field Value

Type | Description |
---|---|

Int64 |

#### TicksPerMinute

A constant for the number of ticks in a minute. The value of this constant is 600,000,000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const long TicksPerMinute = 600000000L`

##### Field Value

Type | Description |
---|---|

Int64 |

#### TicksPerSecond

A constant for the number of ticks in a second. The value of this constant is 10,000,000.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public const long TicksPerSecond = 10000000L`

##### Field Value

Type | Description |
---|---|

Int64 |

#### TicksPerStandardDay

A constant for the number of ticks in a standard 24-hour day.
The value of this constant is 864,000,000,000.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const long TicksPerStandardDay = 864000000000L`

##### Field Value

Type | Description |
---|---|

Int64 |

#### TicksPerStandardWeek

A constant for the number of ticks in a standard week of seven 24-hour days.
The value of this constant is 6,048,000,000,000.

**Since**1.3.x

**Availability**net35-Client, PCL

##### Declaration

`public const long TicksPerStandardWeek = 6048000000000L`

##### Field Value

Type | Description |
---|---|

Int64 |

#### UnixEpoch

The instant at the Unix epoch of midnight 1st January 1970 UTC.

**Since**2.4.x

**Availability**net35-Client, PCL

##### Declaration

`public static readonly Instant UnixEpoch`

##### Field Value

Type | Description |
---|---|

Instant |

##### Remarks

This value is not only the Unix epoch, but the Noda Time epoch, as it represents the value
with a Ticks property of 0.