Pages 1 and 2 describe the first three months as the primary period and encourage continued positive social experiences afterward. This does not supply a 16-week closing deadline.
Growth & age
Puppy Milestones Calendar
Turn your puppy's birth date into a calendar of early learning, teeth and growth milestones.
Puppy birth date
Plan ahead with broad development guides.
PUPPY CALENDAR
Ready when you arePuppy milestones
Ready when you are.
Enter the birth date, then create your puppy's milestones calendar.
For general information only, not professional advice. Check the official sources below. Use your own judgement and speak to a qualified professional before you act.
Based on official guidance
Calculated on your device
A starting point, not advice
HOW TO USE IT
Start with your details
Enter the birth date
Use the date picker or the format shown in the field. Enter the actual birth date, rather than a homecoming or expected due date. Dates are calculated on your device.
Create the calendar
See an approximate early learning marker, the separate 16-week age check-in, the permanent-teeth window and two broad full-size references. All groups appear because birth date alone cannot identify your puppy's size group.
Read the labels
Approximate dates are guides, not deadlines. Past marker and Planning window passed refer to calendar dates, not development being completed. Continue positive experiences beyond the early window.
Save, print or download
Save keeps a separate copy on this device. Open or delete copies through Saved in the navigation. Print produces a clean card, and calendar download adds all-day age markers and clearly named approximate windows.
HOW IT WORKS
What shapes your result
Week N = birth date plus N times seven days. The separate 16-week check-in follows this exact date formula. It comes from the project example and is not a claim that a developmental window closes at sixteen weeks.
RSPCA Australia describes an approximate early learning period ending around fourteen weeks. AVSAB calls the first three months the primary period and encourages continued positive experiences afterward. The calendar uses the RSPCA fourteen-week marker, with both source descriptions explained rather than turning either into a hard deadline.
RSPCA describes permanent teeth appearing and growing rapidly between four and six months. This is shown as an approximate window, rather than an exact first-tooth date or a promise that every adult tooth is present on its last day.
PDSA says most dogs reach full size by around one year. RSPCA and PDSA also explain that some larger dogs can grow until roughly eighteen to twenty-four months. Both broad references are displayed. No toy, small or medium age table, weight threshold or individual size group is invented. Full size does not mean emotional maturity or readiness for strenuous exercise.
Month-based dates use calendar-month anniversaries, each calculated directly from the original birth date. When that day does not exist in the destination month, the date uses that month's last day. Four calendar months and sixteen weeks are different ages. Whole-date arithmetic avoids daylight-saving shifts.
The screen marks each date as upcoming, today or past, and marks approximate windows as current or passed. These labels never confirm that development has happened. Country selection changes date formatting and relevant spelling on this one worldwide page; the underlying milestone dates remain the same.
Saving stores the birth date, not a record of milestones completed. Opening a copy restores its calendar and updates date-relative labels. Editing clears its saved reference and shows an Inputs changed notice. The previous calendar stays visible until you choose Create again. Calendar files keep the original dates, including past dates. A window is one transparent all-day event covering its labelled range; its end date is inclusive on the card and uses the next day as the exclusive calendar-file end. Downloads do not add alarms or repeating events, and do not remove older imports from your calendar app.
Read about our methodologyFAQ
Common questions
Short answers to what people ask most.
When does the early learning window end?
RSPCA describes an approximate period ending around fourteen weeks; AVSAB highlights the first three months. This calendar shows an approximate fourteen-week marker and a separate sixteen-week age check-in. Neither means learning stops. Keep experiences calm, positive and suited to your puppy.
Why is there a 16-week milestone?
It is a PupCalendar age check-in from the specification. Its date is exact arithmetic: birth date plus 112 days. It is not a medical milestone, vaccination date or statement that the early learning window ends on that day.
When will adult teeth appear?
RSPCA describes permanent teeth appearing and growing rapidly between four and six months. The calendar dates that broad window from the birth date. Individual timing varies, and its end is not a guarantee that every adult tooth is present.
When will a puppy be fully grown?
PDSA says most dogs are fully grown by around one year, while some larger dogs can take eighteen months to two years. Both references are shown because birth date alone cannot identify your puppy's size group. The calendar does not predict adult weight, emotional maturity or exercise readiness.
Are four months and sixteen weeks the same date?
No. Weeks use exact seven-day intervals; months use calendar anniversaries. Month-end dates are clamped when necessary and every anniversary stays anchored to the original birth date. A puppy born on 3 August 2026 reaches sixteen weeks on 23 November and four calendar months on 3 December.
Can I save, print and download the milestones?
Yes. Save creates a separate copy in this browser; open or delete copies from Saved. Print includes all milestones and the general-information note. Calendar download includes age markers and approximate all-day windows, with no alarms or recurrence. Past dates keep their original dates. Remove an earlier calendar import yourself before replacing it.
Sources and checked dates
Each note explains what its source supports. Open the link to read the guidance yourself.
Describes an approximate early period from 2.5 to 14 weeks, with short, positive, voluntary experiences. The 14-week date is an approximate marker, not a deadline to stop learning.
The Teething section says permanent teeth appear and grow rapidly between four and six months. This supports a broad growth window, not a guarantee that every adult tooth is present on the end date.
States that some large and giant breeds can continue growing until about 18 to 24 months. This is not an individual exercise-clearance date or a separate numeric age for every size group.
The Size section says most dogs are fully grown by one year, while larger breeds can take 18 months to two years. Supports the two broad groups approved by the user; does not supply toy/small/medium/large/giant weight thresholds.
