Calendar A

Vestos – Calendar Part 1 4

Introduction to Vestos

Introduction to Vestos Days of anticipation The traffic light:

Forbidden days

Days of anticipation

Permissible days

Introduction to Vestos Days of anticipation The idea behind these days

The chachamim feared that a woman’s period might start amidst intimacy, causing the couple to transgress the prohibition of nidah, Chas Veshalom

Therefore, they instituted that the couple abstain from intimacy on certain days when the likelihood of her period starting is higher

Introduction to Vestos Recording How to calculate times of separation The details of the woman’s cycle and dates of anticipated menstruation are recorded in a calendar When?

What?

Who?

Make note as soon as period begins

Period or bedikah

Decide which spouse should be in charge of calculations

Don’t rely on memory

Stains and external wiping usually not taken into account

Introduction to Vestos Definitions Sun

‫ד‬

Mon

‫ה‬

Tue

‫ו‬

Thu

Full day

‫ז‬

‫ח‬

Fri

‫ט‬

Shabbos

‫י‬

Night onah and day onah

Full day

Night and day Beginning at night

Onah

Night onah – sunset to sunrise Day onah – sunrise to sunset

Introduction to Vestos The 3 most common cycles Veses kavua – fixed cycle: If woman consistently gets period according to specific pattern, she only needs to anticipate according to her fixed cycle (more details to be explained later)

A woman without a fixed cycle anticipates period according to all 3 cycles

Onah Beinonis

Veses Hachodesh

Veses Haflaga

Onah Beinonis

Onah Beinonis Explanation Average cycle Most common menstrual cycle

How to calculate

Duration of separation

30th day

Full 24-hour day

The day she gets period is first day of 30 day cycle

From sunset concluding 29th day until sunset of 30th day

Onah Beinonis Example: Tishrei

Onah Beinonis Example: Teves / Shevat

Onah Beinonis Simple calculation: 4 weeks and one day

Teves / Shevat

Onah Beinonis Simple calculation: 4 weeks and one day

Tishrei

Veses Hachodesh

Veses Hachodesh Explanation Same date of the month Maybe it will bring onset of period the next month as well

Recording

By Veses Hachodesh, separation only applies to the onah — night or day — in which the period began last month

Mark on the calendar the onah in which the flow began

Veses Hachodesh Example: Flow began on 3 Tishrei during day onah Keep veses on 3 Cheshvan by day

In 30-day month, Veses Hachodesh will be day after Onah Beinonis

Tishrei / Cheshvan

Veses Hachodesh Teves / Shevat In 29-day month Veses Hachodesh will coincide with Onah Beinonis

Still mark both down There can be halachic ramifications

Veses Hachodesh

Shevat / Adar If flow began on 30 Shevat and next month doesn’t have 30th day: No need to keep Veses Hachodesh that month and not even in subsequent month that has 30th

Veses Haflaga

Veses Haflaga Explanation Haflaga = distance Maybe the next period will arrive at the same interval as there was between the past two periods

How to calculate 1. Count distance between last two periods (from after Hefsek Taharah) 2. Count the same distance from Hefsek Taharah after most recent period and mark onah

Veses Haflaga The distance is counted in onos – 2 per day:

Sun

1

2

Starting point

Mon

3

Tue

4

5

6

Wed

Thu

7

9

8

10

Fri

11 12

Shabbos

13

Count number of clean onos from after the Hefsek Taharah until beginning of next flow (i.e., how long her uterus was “closed”)

14

Veses Haflaga Cheshvan Flow began on 50th onah from Hefsek Taharah 1

Step 1:

2

3

4

5

6

7

8

9

10 11 12

13 14 15 16 17 18 19 20 21 22 23 24

25 26

Mark the number 50 on the side

27 28 29 30 31 32 33 34 35 36 37 38 39 40

Double check the count

41 42 43 44 45 46 47 48

49 50

Veses Haflaga Cheshvan / Kislev Flow began on 50th onah from Hefsek Taharah

45 46 47 48

1

2

3

4

49 50

5

6

7

8

9

10

Step 2: 11 12 13 14 15 16 17 18 19 20 21 22 23 24 After successful Hefsek Taharah Count 50 onos from after Hefsek Taharah and mark 50th onah as Veses Haflaga Double check the count

25 26 27 28 29 30 31 32 33 34 35 36

39 40 41 42 43 44 45 46 47 48

49

50

37 38

Veses Haflaga

First period After only one period, there is no haflaga yet

Veses Haflaga Cheshvan / Kislev If Hefsek Taharah was done a while after flow stopped

From which onah is the haflaga counted?

Consult a rav.

Some say to calculate as if her period lasted 7 days (unless she knows it lasted longer) and then begin counting the onos

Double check the count

1

9

2

3

4

5

6

7

8

10 11 12 13 14 15 16 17 18 19 20 21 22

23 24 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Canceling a Cycle

Canceling a Cycle Onah Beinonis Only kept on 30th day from most recent flow and isn’t carried over to next month

Even if she saw blood before the date of Onah Beinonis, she should erase the marked Onah Beinonis and calculate new one from most recent flow

There is always only one Onah Beinonis on the calendar

Canceling a Cycle

Example: Shevat / Adar

Canceling a Cycle Sivan / Tammuz Canceling a Veses Hachodesh When onah passed clean

Possibility #1 Flow began after the onah

Canceling a Cycle Sivan / Tammuz Canceling a Veses Hachodesh When onah passed clean

Possibility #2 Flow began earlier with Hefsek Taharah before the onah

Canceling a Cycle Tishrei

If flow began earlier and continued through the onah

There is difference of opinion among Chabad rabbonim

Consult your Rav ?

Canceling a Cycle Veses Haflaga Veses Haflaga numbers keep being counted from the most recent Hefsek Taharah until the specific haflaga number gets canceled

A larger haflaga number cancels any previous haflaga numbers that were smaller Flow began one month on 50th onah and next month on 52nd onah

Flow began one month on 50th onah and next month on 48th onah

Only count 52 from Hefsek Taharah

Count 48 and 50 from Hefsek Taharah

Canceling a Cycle Veses Haflaga Flow began

Applicable Haflaga numbers

Nissan

On 50th onah

50

Iyar

On 48th onah

48, 50

Sivan

On 46th onah

46, 48, 50

Tammuz

On 49th onah

46, 48, 49, 50

Av

On 52nd onah

49, 50, 52

All the Haflaga numbers are counted only from most recent Hefsek Taharah

Canceling a Cycle Kislev / Teves Example: Veses Haflaga was marked on 46th onah but flow began already on 44th onah

43 44 45 46

5

6

7

8

1 9

2

3

4

10 11 12 13 14 15 16 17 18

19 20 21 22 23 24 25 26 27 28 29 30 31 32 Both numbers are counted from newest Hefsek Taharah and she marks 44th and 46th onos

33 34 35 36 37 38 39 40 41 42 43 44 45 46

Method of Recording

Method of Recording

The information is generally recorded in two places simultaneously:

Calendar

Chart

Method of Recording Keep a log in the chart:

Mark the following details about the period: (a) the onah it began (b) day of week and day of month (c) haflaga number (d) whether the previous number was canceled

Step 1:

Night/day

Day of week

Date

Haflaga number

Canceled

Night

Mon

‫ג' תשרי‬

45

X

Day

Sun

‫ל' תשרי‬

46

Method of Recording Mark calendar: Step 2:

Step 3:

Mark the day and onah when the flow began, and calculate the Onah Beinonis and Veses Hachodesh

After successful Hefsek Taharah count and mark Veses Haflaga