A first glimpse of the new moon could be treated as lucky or unlucky depending on exactly how it was seen. Irish folklore records bad luck from seeing it through a window, wishes made at its first appearance, and rituals involving money or clothing. Elsewhere, the feared action may be pointing at the moon, sleeping in moonlight, cutting hair during the wrong lunar phase, or behaving incorrectly during an eclipse.
These traditions do not form one universal system. Even closely related records disagree about whether the left or right shoulder is fortunate. Lunar eclipses produce another set of beliefs: Filipino traditions describe a moon-swallowing creature, while pregnancy-related customs recorded in the Philippines and Mexico prescribe different protective actions. The variations are best understood as regional folklore rather than predictions produced by the moon itself.
The New Moon as a Monthly Test of Luck
Seeing the New Moon Through a Window Brings Bad Luck
One of the clearest recurring moon beliefs in Irish folklore warns against seeing the new moon for the first time through window glass. Records from Cork, Louth, Cavan, Donegal, Kilkenny and other areas attach bad luck, trouble or an unlucky month to that first obstructed view.
The First New Moon Can Carry a Wish
The first sight of a new moon is also recorded as a wishing moment. A Wexford tradition instructed the observer to bow seven times while looking at the moon, but not through glass, and then make a wish. Other archive records preserve shorter first-sighting wish customs.
Money Shown or Turned at the New Moon Will Multiply
Money frequently appears in new-moon luck rituals. An Irish record from Drumshanbo says to turn money in the hand when the new moon appears so that more will come. Nineteenth-century north-east Scottish folklore also records turning money in the pocket, while a Michigan archive preserves the instruction to show money to the new moon.
Which Shoulder the Moon Appears Over Can Reverse the Omen
Shoulder-direction lore is unusually inconsistent. One Louth record gives good luck when the moon is seen over the left shoulder, while another local account associates looking across the right shoulder with disappointment. Michigan collections include versions in which the left shoulder is unlucky. The direction therefore cannot be generalized across regions.
Turning Clothing at the New Moon Changes Your Luck
A Leitrim folklore record gives two domestic responses to the new moon: turning a coat was associated with receiving a new one, while turning an apron was supposed to bring good luck. These small actions belong to the same first-sighting complex as wishes and money rituals.
Marriage, the Body, and Household Timing
A Full-Moon Wedding Predicts Wealth
A Roscommon record in Ireland’s Schools’ Collection says that marrying while the moon is full foretells wealth, while marrying when it is not full foretells poverty. The belief links the visible fullness of the moon with the hoped-for fullness of a household’s fortunes.
Reflected Moons Can Predict Years Until Marriage
Irish Halloween folklore includes a lunar marriage-divination practice using water and a mirror. When moonlight was available, a vessel of water was left outside and a mirror held over it. The number of moons seen in the reflection was interpreted as the number of years before marriage.
Sleeping in Moonlight Is Dangerous
Walter Gregor’s nineteenth-century collection from north-east Scotland records fears that sleeping with moonlight on the face could twist the features or cause madness, with the belief noted especially among sailors. Texas folklore later preserved a simpler version: sleeping in moonlight would make a person go crazy.
Food Preparation Should Follow the Waxing Moon
Gregor’s north-east Scottish material records a household rule that a pig intended for salting should be killed while the moon was increasing; otherwise the meat was thought not to keep properly. The same passage says rennet from an animal killed outside the waxing phase was considered ineffective.
The Full Moon and the Human Body
The Full Moon Makes People Behave Strangely
The familiar idea that a full moon increases erratic, aggressive or unusual behavior survives as modern occupational folklore as well as older moon lore. A USC folklore record describes an informant who expected more reckless or unusual behavior on full-moon nights and used the moon as an explanation for otherwise ordinary incidents.
More Babies Are Born During a Full Moon
A related hospital belief says labor wards become busier as the moon approaches fullness. The idea is persistent enough to have been examined repeatedly in medical research, where it is treated as a popular belief rather than a reliable way to predict when labor will begin.
Cut Hair While the Moon Is Waxing So It Grows Faster
A British family tradition recorded by the USC Digital Folklore Archives says hair should be cut while the moon is waxing so it will return thicker and faster, while cutting during the waning phase would slow or weaken growth. Related full-moon haircut beliefs are recorded in other family traditions as well.
Pointing at the Moon
Pointing at the Moon Can Bring an Injury to the Ear
Taiwanese and Hmong folklore records warn children not to point directly at the moon. In versions preserved by USC’s folklore archive, the consequence is an injury or cut to the ear. Taiwanese accounts may connect the punishment with disrespect toward a lunar divine figure, especially when the moon is being observed during Mid-Autumn celebrations.
When the Moon Disappears
A Creature Is Swallowing the Moon During an Eclipse
Philippine traditions include the idea that a serpent or dragon is responsible for a lunar eclipse. The National Museum of the Philippines records an Abaknon belief that a snake swallows the moon, while another Filipino tradition names the moon-eating being Bakunawa. In some accounts, people make noise or command the creature to release the moon.
Pregnant Women Should Not Move About During a Lunar Eclipse
The National Museum of the Philippines records an Abaknon eclipse belief in which pregnant women are told not to enter or leave a house while the eclipse is occurring. Moving during the event is traditionally associated with miscarriage. This is a cultural restriction, not medical guidance.
Red Cloth Protects a Pregnancy During a Lunar Eclipse
A Mexican family belief recorded by USC instructs a pregnant woman to place a red towel over her abdomen during a lunar eclipse to protect the baby. Other Mexican and Mexican-American eclipse traditions use different objects, but the red-cloth version is a separately documented protective practice rather than a medical safeguard.
Regional Variations in Recorded Moon Beliefs
| Country or Culture | Documented Variation | Meaning | Scope |
|---|---|---|---|
| Ireland | First glimpse of the new moon through a window | Bad luck | Recorded Glantane folklore |
| Ireland | Turn money in the hand on seeing the new moon | More money expected | Drumshanbo folklore record |
| Ireland | Turn a coat or apron at the new moon | Luck or new clothing | Drumshanbo folklore record |
| Ireland | Bow seven times to the new moon and make a wish | Wish fulfillment | Recorded Wexford tradition |
| Ireland | View the new moon over a particular shoulder | Luck varies by direction | Louth archive record |
| Ireland | Marry when the moon is full | Wealth in marriage | Roscommon marriage folklore |
| Ireland | Count reflected moons in water during Halloween divination | Years until marriage | Schools’ Collection tradition discussed by Maynooth University |
| United Kingdom | See the new moon first through a window | Bad luck | Nineteenth-century north-east Scottish folklore |
| United Kingdom | Turn money in the pocket at first sight of the new moon | Material luck | Nineteenth-century north-east Scottish folklore |
| United Kingdom | Sleep with moonlight falling on the face | Madness or bodily harm | Scottish folklore, including a sailors’ version |
| United Kingdom | Slaughter a pig for salting while the moon is waxing | Successful food preservation | Historic household belief |
| United States | Sleep in the light of the moon | Madness | Texas folklore collection |
| United States | See the new moon through a window or through trees | Bad luck | Texas folklore collection |
| United States | Show money to a new moon | More money expected | James T. Callow Folklore Archive record |
| United States | See the new moon over the left shoulder | Bad luck | Michigan folklore records |
| United States | Expect more erratic behavior during a full moon | Behavioral warning | Modern recorded folk belief |
| United Kingdom | Cut hair during a waxing moon and avoid the waning moon | Faster or thicker hair growth | Family tradition recorded in Liverpool |
| Taiwan | Do not point at the moon | Ear injury or punishment | Taiwanese family folklore |
| Hmong communities | Pointing at the moon causes the ear to be cut | Warning | Hmong cultural folklore record |
| Philippines | A snake swallows the moon during an eclipse | Eclipse interpretation | Abaknon traditional knowledge |
| Philippines | Bakunawa attempts to swallow the moon and is driven away with noise | Protection of the moon | Filipino folklore performance |
| Philippines | Pregnant women should not enter or leave during a lunar eclipse | Pregnancy protection | Abaknon eclipse belief |
| Mexico | Place a red towel over the abdomen during a lunar eclipse | Pregnancy protection | Mexican family folklore record |
When Moon Folklore Makes a Testable Claim
Some moon beliefs concern luck, marriage or symbolic protection and cannot be tested in the same way as a medical claim. Others predict measurable changes in behavior or childbirth. Research has repeatedly examined those ideas. One study covering 8,473 psychiatric admissions and 1,909 emergency psychiatric evaluations found no phase-related rise in admissions or presentations. A separate five-year obstetric study found no predictable influence of the lunar cycle on birth frequency, delivery type or birth complications.
The distinction matters when a traditional belief concerns health or pregnancy. Practices such as eclipse restrictions, red cloth, moon-timed haircuts or lunar timing of childbirth can be documented as folklore without treating them as medical prevention, diagnosis or treatment.
📚 Roots of Belief
- National Folklore Collection, UCD — “Superstitions,” Glantane, County Cork — A Schools’ Collection record documenting the belief that the first glimpse of the new moon through a window brings bad luck during that month.
- National Folklore Collection, UCD — “Superstitious Customs and Beliefs,” Drumshanbo — Records new-moon practices involving turning a coat, turning an apron and turning money in the hand for luck or increase.
- National Folklore Collection, UCD — “Lore of Certain Days,” Glynn — Preserves a Wexford instruction to bow seven times to the new moon, avoid viewing it through glass and make a wish.
- National Folklore Collection, UCD — “Superstitions,” Fieldstown, Drogheda — Documents new-moon beliefs involving windows, wishes and shoulder direction in County Louth.
- National Folklore Collection, UCD — “Local Marriage Customs,” Droichead na Ceathramhna — Records a Roscommon belief that marriage during a full moon foretells wealth, while marriage without a full moon foretells poverty.
- Maynooth University — “Preserving Samhain: Halloween in the Schools’ Collection of Irish folklore” — Discusses marriage divination in which reflected moons in water are counted to predict the number of years before marriage.
- Walter Gregor — Notes on the Folk-lore of the North-east of Scotland (1881) — A Folklore Society volume recording new-moon money customs, fears about sleeping in moonlight and lunar timing rules for food preparation in north-east Scotland.
- UNT Digital Library — The Best of Texas Folk and Folklore: 1916–1954, page 237 — University of North Texas digitization preserving beliefs that sleeping in moonlight causes madness and that viewing the new moon through glass or vegetation brings bad luck.
- University of Detroit Mercy Libraries — James T. Callow Folklore Archive, “Lunar Belief” — A Michigan archive record stating that showing money to a new moon will result in receiving more money.
- University of Detroit Mercy Libraries — James T. Callow Folklore Archive, Moon Belief Records — Includes Michigan records treating the new moon over the left shoulder as an unlucky sighting.
- USC Digital Folklore Archives — “Full Moon Craziness” — Records a modern American folk belief associating the full moon with unusual, reckless or aggressive behavior.
- PubMed — “No effect of lunar cycle on psychiatric admissions or emergency evaluations” — Medical research comparing lunar phases with thousands of psychiatric admissions and emergency evaluations and finding no phase-related increase.
- PubMed — “The effect of the lunar cycle on frequency of births and birth complications” — A five-year obstetric analysis testing the full-moon childbirth belief and finding no predictable relationship with birth frequency or complications.
- USC Digital Folklore Archives — “Cutting Hair with the Moon” — Records a British family tradition from Liverpool in which waxing-moon haircuts are associated with faster or thicker growth and waning-moon haircuts with slower growth.
- USC Digital Folklore Archives — “Pointing at the Moon” — A Taiwanese-American family account warning children not to point at the moon, with punishment directed at the ear.
- USC Digital Folklore Archives — “Don’t point at the moon or else it will cut your ear” — Documents the same warning specifically within a Hmong cultural context.
- National Museum of the Philippines — “Abaknon and their view of the world” — An Ethnology Division account describing Abaknon lunar terminology, the eclipse belief that a snake swallows the moon, and restrictions traditionally placed on pregnant women during an eclipse.
- USC Digital Folklore Archives — “Filipino Eclipse Myth” — Records a Filipino Bakunawa narrative in which a moon-eating creature is confronted by making loud sounds with metal objects and music.
- USC Digital Folklore Archives — “Lunar Eclipse and a Red Towel” — Records a Mexican family belief that a red towel placed over a pregnant woman’s abdomen during a lunar eclipse offers protection.