[−][src]Enum heca_lib::prelude::MonthSchedule
A Hebrew year can be defined by three variables:
- The first day of Rosh Hashana - Monday (the second day of the week, represented by Beis - Ba), Tuesday (the third day of the week, represented by Gimmel - Ga), Thursday (the fifth day of the week, represented by Hei - Ha) and Shabbos (the seventh day of the week, represented by Zayin - Za).
- The length of the year, specifically, if Cheshvan and Kislev are both full (Sheleima - 30 days long), empty (Chaseir - 29 days long), or in regular order ("Kesidra", Cheshvan is 29 days long and Kislev is 30. So the year goes 30,29,30,29 etc.).
- The day Pesach starts, defined as on Rosh Hashana above.
So, for example, 5779 is a BaShaZ year - that is, the first day of Rosh Hashana was on a Monday (Beis - Ba), Bosh Cheshvan and Kislev are full (Shleimah - Shin), and the first night of Pesach was on Friday night (Zain - Z for Shabbos).
Examples
use heca_lib::HebrewYear; use heca_lib::prelude::*; assert_eq!(HebrewYear::new(5779)?.year_type(),MonthSchedule::BaShaZ);
Find out how often does Pesach start on which days:
use heca_lib::HebrewYear; use heca_lib::prelude::*; let (mut thu, mut tue, mut sun, mut sat) = (0,0,0,0); for year in 3765..9999 { let t = HebrewYear::new(year)?.year_type(); match t { MonthSchedule::GaChaH | MonthSchedule::BaShaH | MonthSchedule::BaChaH | MonthSchedule::ZaShaH => thu += 1, MonthSchedule::HaShaG | MonthSchedule::ZaShaG | MonthSchedule::ZaChaG | MonthSchedule::BaChaG => tue += 1, MonthSchedule::HaShA | MonthSchedule::ZaChA | MonthSchedule::HaChA => sun += 1, MonthSchedule::HaKaZ | MonthSchedule::BaShaZ | MonthSchedule::GaKaZ => sat += 1, } } assert_eq!(thu, 1782); assert_eq!(tue, 1988); assert_eq!(sun, 718); // <-- Note, that Pesach falls out on a Motzei Shabbos only 10% of the time. assert_eq!(sat, 1746);
Find out when will Pesach start on Motzei Shabbos:
use heca_lib::HebrewYear; use heca_lib::prelude::*; let mut years: Vec<u64> = Vec::new(); for year in 5780..5880 { let t = HebrewYear::new(year).unwrap().year_type(); match t { MonthSchedule::HaShA | MonthSchedule::ZaChA | MonthSchedule::HaChA => years.push(year), _ => { } } } assert_eq!(years, vec![5781, 5785, 5805, 5808, 5812, 5832, 5835, 5839, 5859, 5863] ); // <-- We'll have two of them over the next few years, and then Pesach won't fall out on Motzei Shabbos for twenty years!
Variants
BaChaG
BaShaH
GaChaH
HaKaZ
HaShA
ZaChA
ZaShaG
BaChaH
BaShaZ
GaKaZ
HaChA
HaShaG
ZaChaG
ZaShaH
Trait Implementations
impl Clone for MonthSchedule
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fn clone(&self) -> MonthSchedule
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl PartialEq<MonthSchedule> for MonthSchedule
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fn eq(&self, other: &MonthSchedule) -> bool
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#[must_use]
fn ne(&self, other: &Rhs) -> bool
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#[must_use]
fn ne(&self, other: &Rhs) -> boolThis method tests for !=
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impl Eq for MonthSchedule
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impl Copy for MonthSchedule
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impl Debug for MonthSchedule
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impl Serialize for MonthSchedule
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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
__S: Serializer,
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__S: Serializer,
impl<'de> Deserialize<'de> for MonthSchedule
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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
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__D: Deserializer<'de>,
Auto Trait Implementations
impl Send for MonthSchedule
impl Sync for MonthSchedule
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> DeserializeOwned for T where
T: Deserialize<'de>,
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T: Deserialize<'de>,