Django NPDateTime

Nepali Date Field and Date Picker Widget for Django

A Django package that provides custom model fields, form fields, and a modern date picker widget for working with Nepali (Bikram Sambat) dates. Powered by the high-performance npdatetime library.

Features

✨ Custom Model Fields - NepaliDateField and NepaliDateTimeField with direct access to fiscal year/quarter properties ... ✨ Fiscal Year Support - Built-in support for Nepali Fiscal Years (e.g., 2080/81) and quarters

🎨 Beautiful Date Picker Widget - Modern, responsive date picker with both BS and AD modes

🌐 Bilingual Support - English and Nepali language options

🔄 Auto Conversion - Seamless conversion between Bikram Sambat and Gregorian calendars

📝 Template Tags & Filters - Rich template tags for date formatting and conversion

⚡ High Performance - Built on Rust for maximum speed

🎯 Django Integration - Works seamlessly with Django's forms and admin

For Developers

If you're contributing to this package, the JavaScript/CSS files are synchronized from ../javascript/. When you update the date picker:

# Run the build script to sync assets
python build_assets.py
# or
./build_assets.sh

This copies:

• picker.js → static/npdt/js/picker.min.js
• picker.css → static/npdt/css/picker.css
• pkg/ → static/npdt/js/pkg/

Installation

pip install django-npdt
# or with uv
uv add django-npdt

Quick Start

1. Add to INSTALLED_APPS

# settings.py
INSTALLED_APPS = [
    ...
    'npdt',
    ...
]

2. Use in Models

from django.db import models
from npdt import NepaliDateField

class Person(models.Model):
    name = models.CharField(max_length=100)
    birth_date_bs = NepaliDateField()
    
    def __str__(self):
        return f"{self.name} - {self.birth_date_bs}"

3. Use in Forms

from django import forms
from npdt import NepaliDateField, NepaliDatePickerWidget

class PersonForm(forms.Form):
    name = forms.CharField(max_length=100)
    birth_date = NepaliDateField(
        mode='BS',
        language='np',
        label='जन्म मिति'
    )

4. Use Template Tags

{% load nepali_date %}

<p>Birth Date (BS): {{ person.birth_date_bs }}</p>
<p>Birth Date (AD): {{ person.birth_date_bs|to_gregorian_date }}</p>
<p>Fiscal Year: {{ person.birth_date_bs.fiscal_year }}</p>
<p>Today in BS: {% nepali_date_today %}</p>
<p>Month: {{ 1|nepali_month_name:"np" }}</p>
<p>Inline Picker: {% nepali_date_picker "event_date" theme="dark" %}</p>

Usage Guide

Model Fields

NepaliDateField

Stores Nepali dates in YYYY-MM-DD format.

from npdt.models import NepaliDateField

class Event(models.Model):
    event_name = models.CharField(max_length=200)
    event_date_bs = NepaliDateField(mode='BS', language='np')  # Configurable!

NepaliDateTimeField

Stores Nepali dates with time in YYYY-MM-DD HH:MM:SS format.

from npdt.models import NepaliDateTimeField

class Meeting(models.Model):
    title = models.CharField(max_length=200)
    scheduled_at_bs = NepaliDateTimeField()

Form Fields and Widgets

Basic Date Picker

from npdt.forms import NepaliDateField

class PersonForm(forms.Form):
    birth_date = NepaliDateField(
        mode='BS',           # 'BS' or 'AD'
        language='en',       # 'en' or 'np'
    )

Advanced Configuration

from npdt.widgets import NepaliDatePickerWidget

class EventForm(forms.Form):
    event_date = forms.CharField(
        widget=NepaliDatePickerWidget(
            mode='BS',
            language='np',
            theme='dark',
            show_today_button=True,
            show_clear_button=True,
            min_date='2080-01-01',
            max_date='2085-12-30',
        )
    )

Date Range Picker

from npdt.forms import NepaliDateRangeField

class ReportForm(forms.Form):
    report_period = NepaliDateRangeField(
        mode='BS',
        language='np'
    )
    
    def clean_report_period(self):
        period = self.cleaned_data['report_period']
        start_date, end_date = period.split(' to ')
        # Process date range
        return period

Template Tags and Filters

Load the template tag library:

{% load nepali_date %}

Convert Gregorian to Nepali

{{ gregorian_date|to_nepali_date }}
{{ gregorian_date|to_nepali_date:"%Y/%m/%d" }}

Convert Nepali to Gregorian

{{ nepali_date|to_gregorian_date }}
{{ nepali_date|to_gregorian_date:"%d/%m/%Y" }}

Format Nepali Date

{{ "2081-01-15"|format_nepali_date:"%Y/%m/%d" }}

Get Month Name

{{ 1|nepali_month_name }}        {# Baisakh #}
{{ 1|nepali_month_name:"np" }}   {# बैशाख #}

Convert to Nepali Numerals

{{ 2081|to_nepali_number }}  {# २०८१ #}

Fiscal Year and Quarter

{{ "2081-01-15"|fiscal_year }}     {# 2080/81 #}
{{ "2081-01-15"|fiscal_quarter }}  {# 3 #}

Get Today's Date

{% nepali_date_today %}
{% nepali_date_today "%Y/%m/%d" %}

Widget Options

The NepaliDatePickerWidget accepts the following options:

Option	Type	Default	Description
mode	str	'BS'	Calendar mode: 'BS' or 'AD'
language	str	'en'	Interface language: 'en' or 'np'
theme	str	'auto'	Color theme: 'auto', 'light', or 'dark'. 'auto' follows html[data-theme].
format	str	'%Y-%m-%d'	Date format string
include_time	bool	False	Include time picker
show_today_button	bool	True	Show "Today" button
show_clear_button	bool	True	Show "Clear" button
min_date	str	None	Minimum selectable date
max_date	str	None	Maximum selectable date

Admin Integration

The date picker automatically integrates with Django admin:

from django.contrib import admin
from .models import Person

@admin.register(Person)
class PersonAdmin(admin.ModelAdmin):
    list_display = ['name', 'birth_date_bs']
    fields = ['name', 'birth_date_bs']

Examples

Complete Model Example

from django.db import models
from npdt.models import NepaliDateField, NepaliDateTimeField

class Employee(models.Model):
    name = models.CharField(max_length=100)
    join_date_bs = NepaliDateField(help_text="Joining date in BS")
    birth_date_bs = NepaliDateField(blank=True, null=True)
    last_login_bs = NepaliDateTimeField(blank=True, null=True)
    
    class Meta:
        ordering = ['-join_date_bs']
    
    def __str__(self):
        return f"{self.name} (Joined: {self.join_date_bs})"

ModelForm Example

from django import forms
from .models import Employee

class EmployeeForm(forms.ModelForm):
    class Meta:
        model = Employee
        fields = ['name', 'join_date_bs', 'birth_date_bs']
        widgets = {
            'join_date_bs': NepaliDatePickerWidget(
                mode='BS',
                language='np',
                theme='light'
            ),
            'birth_date_bs': NepaliDatePickerWidget(
                mode='BS',
                language='np'
            ),
        }

Template Example

{% load nepali_date %}
<!DOCTYPE html>
<html>
<head>
    <title>Employee Details</title>
</head>
<body>
    <h1>{{ employee.name }}</h1>
    
    <div>
        <strong>Join Date (BS):</strong> 
        {{ employee.join_date_bs|format_nepali_date:"%Y/%m/%d" }}
    </div>
    
    <div>
        <strong>Join Date (AD):</strong> 
        {{ employee.join_date_bs|to_gregorian_date:"%B %d, %Y" }}
    </div>
    
    <div>
        <strong>Birth Month:</strong>
        {{ employee.birth_date_bs|slice:":7"|last|int|nepali_month_name:"np" }}
    </div>
</body>
</html>

Requirements

• Python >= 3.8
• Django >= 3.2
• npdatetime >= 0.1.0

Browser Support

• Chrome/Edge (latest)
• Firefox (latest)
• Safari (latest)
• Mobile browsers (iOS Safari, Chrome Mobile)

License

MIT License - see LICENSE file for details

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Credits

Built on top of:

• npdatetime(Rust) - High-performance Nepali datetime library (Rust)

Support

For bugs and feature requests, please open an issue on GitHub.