---
title: In the Gregorian calendar a century year is a leap year only if it d… — How our calendar was made: Romans, Julius Caesar… · tree and pragmatics
description: In the Gregorian calendar a century year is a leap year only if it divides exactly by 400, so 2000 was a leap year but 1900 was not. Who acts: century year, calendar, 2000. A sentence of the lesson «How our calendar was made: Romans, Julius Caesar and Pope Gregory» of the world course of Mova's prim
---

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# How our calendar was made: Romans, Julius Caesar and Pope Gregory, sentence 18

<!-- .ven lang=en -->
In the Gregorian calendar a century year is a leap year only if it divides exactly by 400, so 2000 was a leap year but 1900 was not.

<!-- .vintro -->
**Who acts:** century year, calendar, 2000 · **What happens:** be, divide · **To what, where:** leap year, Gregorian calendar

<!-- .vabout -->
This is a sentence of the lesson «How our calendar was made: Romans, Julius Caesar and Pope Gregory» of the world course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (century year, calendar, 2000), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:116-how-our-calendar-was-made.lesson:18
# text = In the Gregorian calendar a century year is a leap year only if it divides exactly by 400, so 2000 was a leap year but 1900 was not.
# source = school lesson (ours)
# course = world
# lesson = 116-how-our-calendar-was-made.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R6-punct-agree ×1, R7-rel-agree ×1
1	In	in	ADP	IN	_	4	case	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	Gregorian	gregorian	ADJ	JJ	Degree=Pos	4	amod	_	_
4	calendar	calendar	NOUN	NN	Number=Sing	11	obl	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	century	century	NOUN	NN	Number=Sing	7	compound	_	_
7	year	year	NOUN	NN	Number=Sing	11	nsubj	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
10	leap	leap	NOUN	NN	Number=Sing	11	compound	_	_
11	year	year	NOUN	NN	Number=Sing	25	parataxis	_	_
12	only	only	ADV	RB	_	15	advmod	_	_
13	if	if	SCONJ	IN	_	15	mark	_	_
14	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	15	nsubj	_	_
15	divides	divide	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	advcl	_	Agree=R7-rel-agree|Haiku=11:acl:relcl
16	exactly	exactly	ADV	RB	_	18	advmod	_	_
17	by	by	ADP	IN	_	18	case	_	_
18	400	400	NUM	CD	NumForm=Digit|NumType=Card	15	obl	_	_
19	,	,	PUNCT	,	_	21	punct	_	_
20	so	so	ADV	RB	_	21	advmod	_	_
21	2000	2000	NUM	CD	NumForm=Digit|NumType=Card	25	nsubj	_	_
22	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	25	cop	_	_
23	a	a	DET	DT	Definite=Ind|PronType=Art	25	det	_	_
24	leap	leap	NOUN	NN	Number=Sing	25	compound	_	_
25	year	year	NOUN	NN	Number=Sing	0	root	_	_
26	but	but	CCONJ	CC	_	28	cc	_	_
27	1900	1900	NUM	CD	NumForm=Digit|NumType=Card	28	nsubj	_	_
28	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	25	conj	_	_
29	not	not	PART	RB	Polarity=Neg	28	advmod	_	_
30	.	.	PUNCT	.	_	11	punct	_	Agree=R6-punct-agree|Haiku=25:punct
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | a century year | a leap year |  | the Gregorian calendar |  |  | tree rules |
| 2 | **divide** *a condition, not said to happen* | present | calendar |  |  |  |  | by 400 | vn multiply-108-1 «NP V NP PP.co-theme»: agent=Agent by 400=Co-Theme |
| 3 | **is a** | past | 2000 | a leap year |  |  |  |  | tree rules |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:world:116-how-our-calendar-was-made.lesson:18`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R6-punct-agree ×1, R7-rel-agree ×1. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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