System Variables

System variables are built-in placeholders that are automatically available in every template. You don’t need to pass them in your API data — they are injected at generation time.

All system variables use the sys prefix to avoid conflicts with your own data.

Available variables

Variable	Description	Example output
`{{sys.current_date}}`	Current date (YYYY-MM-DD)	`2026-01-15`
`{{sys.current_time}}`	Current time (HH:MM:SS)	`14:30:45`
`{{sys.current_datetime}}`	Full date and time	`2026-01-15 14:30:45`
`{{sys.year}}`	Current year	`2026`
`{{sys.month}}`	Current month (1–12)	`1`
`{{sys.month_name}}`	Full month name	`January`
`{{sys.day}}`	Day of the month (1–31)	`15`
`{{sys.weekday}}`	Day of the week	`Wednesday`
`{{sys.page_number}}`	Current page number	`1`
`{{sys.total_pages}}`	Total number of pages	`3`

Date and time

Use these to stamp when a PDF was generated:


Generated on {{sys.current_date}} at {{sys.current_time}}

You can also combine individual date components for a different format:


{{sys.month_name}} {{sys.day}}, {{sys.year}}

This outputs: January 15, 2026

All date and time values use the UTC timezone.

Page numbers

Page numbers are most useful in headers and footers since they repeat on every page:


Page {{sys.page_number}} of {{sys.total_pages}}

This updates automatically on each page of multi-page documents.

Good to know

System variables cannot be overridden by your API data — even if you pass a sys key, it will be ignored.
Page numbering is calculated during PDF generation and is not reflected in the editor preview.